CVE-2026-20021 (GCVE-0-2026-20021)
Vulnerability from cvelistv5 – Published: 2026-03-04 18:35 – Updated: 2026-03-04 21:30
VLAI
EPSS
VEX
Summary
A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.
This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-04 21:29 UTC
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software |
Affected:
9.12.1
Affected: 9.12.1.2 Affected: 9.12.1.3 Affected: 9.12.2 Affected: 9.12.2.4 Affected: 9.12.2.5 Affected: 9.12.2.9 Affected: 9.12.3 Affected: 9.12.3.2 Affected: 9.12.3.7 Affected: 9.12.4 Affected: 9.12.3.12 Affected: 9.12.3.9 Affected: 9.12.2.1 Affected: 9.12.4.2 Affected: 9.12.4.4 Affected: 9.12.4.7 Affected: 9.12.4.10 Affected: 9.12.4.13 Affected: 9.12.4.8 Affected: 9.12.4.18 Affected: 9.12.4.24 Affected: 9.12.4.26 Affected: 9.12.4.29 Affected: 9.12.4.30 Affected: 9.12.4.35 Affected: 9.12.4.37 Affected: 9.12.4.38 Affected: 9.12.4.39 Affected: 9.12.4.40 Affected: 9.12.4.41 Affected: 9.12.4.47 Affected: 9.12.4.48 Affected: 9.12.4.50 Affected: 9.12.4.52 Affected: 9.12.4.54 Affected: 9.12.4.55 Affected: 9.12.4.56 Affected: 9.12.4.58 Affected: 9.12.4.62 Affected: 9.12.4.65 Affected: 9.12.4.67 Affected: 9.16.1 Affected: 9.16.1.28 Affected: 9.16.2 Affected: 9.16.2.3 Affected: 9.16.2.7 Affected: 9.16.2.11 Affected: 9.16.2.13 Affected: 9.16.2.14 Affected: 9.16.3 Affected: 9.16.3.3 Affected: 9.16.3.14 Affected: 9.16.3.15 Affected: 9.16.3.19 Affected: 9.16.3.23 Affected: 9.16.4 Affected: 9.16.4.9 Affected: 9.16.4.14 Affected: 9.16.4.19 Affected: 9.16.4.27 Affected: 9.16.4.38 Affected: 9.16.4.39 Affected: 9.16.4.42 Affected: 9.16.4.48 Affected: 9.16.4.55 Affected: 9.16.4.57 Affected: 9.16.4.61 Affected: 9.16.4.62 Affected: 9.16.4.67 Affected: 9.16.4.70 Affected: 9.16.4.71 Affected: 9.16.4.76 Affected: 9.16.4.82 Affected: 9.16.4.84 Affected: 9.16.4.85 Affected: 9.17.1 Affected: 9.17.1.7 Affected: 9.17.1.9 Affected: 9.17.1.10 Affected: 9.17.1.11 Affected: 9.17.1.13 Affected: 9.17.1.15 Affected: 9.17.1.20 Affected: 9.17.1.30 Affected: 9.17.1.33 Affected: 9.17.1.39 Affected: 9.17.1.45 Affected: 9.17.1.46 Affected: 9.18.1 Affected: 9.18.1.3 Affected: 9.18.2 Affected: 9.18.2.5 Affected: 9.18.2.7 Affected: 9.18.2.8 Affected: 9.18.3 Affected: 9.18.3.39 Affected: 9.18.3.46 Affected: 9.18.3.53 Affected: 9.18.3.55 Affected: 9.18.3.56 Affected: 9.18.4 Affected: 9.18.4.5 Affected: 9.18.4.8 Affected: 9.18.4.22 Affected: 9.18.4.24 Affected: 9.18.4.29 Affected: 9.18.4.34 Affected: 9.18.4.40 Affected: 9.18.4.47 Affected: 9.18.4.50 Affected: 9.18.4.52 Affected: 9.18.4.53 Affected: 9.18.4.57 Affected: 9.18.4.66 Affected: 9.18.4.67 Affected: 9.18.4.68 Affected: 9.19.1 Affected: 9.19.1.5 Affected: 9.19.1.9 Affected: 9.19.1.12 Affected: 9.19.1.18 Affected: 9.19.1.22 Affected: 9.19.1.24 Affected: 9.19.1.27 Affected: 9.19.1.28 Affected: 9.19.1.31 Affected: 9.19.1.37 Affected: 9.19.1.38 Affected: 9.19.1.42 Affected: 9.20.1 Affected: 9.20.1.5 Affected: 9.20.2 Affected: 9.20.2.10 Affected: 9.20.2.21 Affected: 9.20.2.22 Affected: 9.20.3 Affected: 9.20.3.4 Affected: 9.20.3.7 Affected: 9.20.3.9 Affected: 9.20.3.10 Affected: 9.20.3.13 Affected: 9.20.3.16 Affected: 9.20.3.20 Affected: 9.20.4 Affected: 9.20.4.7 Affected: 9.20.4.10 Affected: 9.20.4.14 Affected: 9.22.1.1 Affected: 9.22.1.3 Affected: 9.22.1.2 Affected: 9.22.1.6 Affected: 9.22.2 Affected: 9.22.2.4 Affected: 9.22.2.9 Affected: 9.22.2.13 Affected: 9.22.2.14 Affected: 9.23.1 Affected: 9.23.1.3 Affected: 9.23.1.7 Affected: 9.23.1.13 Affected: 9.23.1.19 Affected: 9.23.1.22 |
guessed | |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software |
Affected:
6.4.0
Affected: 6.4.0.1 Affected: 6.4.0.3 Affected: 6.4.0.2 Affected: 6.4.0.4 Affected: 6.4.0.5 Affected: 6.4.0.6 Affected: 6.4.0.7 Affected: 6.4.0.8 Affected: 6.4.0.9 Affected: 6.4.0.10 Affected: 6.4.0.11 Affected: 6.4.0.12 Affected: 6.4.0.13 Affected: 6.4.0.14 Affected: 6.4.0.15 Affected: 6.4.0.16 Affected: 6.4.0.17 Affected: 6.4.0.18 Affected: 7.0.0 Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.0.4 Affected: 7.0.5 Affected: 7.0.6 Affected: 7.0.6.1 Affected: 7.0.6.2 Affected: 7.0.6.3 Affected: 7.0.7 Affected: 7.0.8 Affected: 7.0.8.1 Affected: 7.1.0 Affected: 7.1.0.1 Affected: 7.1.0.2 Affected: 7.1.0.3 Affected: 7.2.0 Affected: 7.2.0.1 Affected: 7.2.1 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.2.4 Affected: 7.2.4.1 Affected: 7.2.5 Affected: 7.2.5.1 Affected: 7.2.6 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.2.8 Affected: 7.2.8.1 Affected: 7.2.9 Affected: 7.2.10 Affected: 7.2.10.2 Affected: 7.3.0 Affected: 7.3.1 Affected: 7.3.1.1 Affected: 7.3.1.2 Affected: 7.4.0 Affected: 7.4.1 Affected: 7.4.1.1 Affected: 7.4.2 Affected: 7.4.2.1 Affected: 7.4.2.2 Affected: 7.4.2.3 Affected: 7.4.2.4 Affected: 7.4.3 Affected: 7.6.0 Affected: 7.6.1 Affected: 7.6.2 Affected: 7.6.2.1 Affected: 7.7.0 Affected: 7.7.10 Affected: 7.7.10.1 |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20021",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-04T21:29:56.096429Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T21:30:11.471Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "9.12.1"
},
{
"status": "affected",
"version": "9.12.1.2"
},
{
"status": "affected",
"version": "9.12.1.3"
},
{
"status": "affected",
"version": "9.12.2"
},
{
"status": "affected",
"version": "9.12.2.4"
},
{
"status": "affected",
"version": "9.12.2.5"
},
{
"status": "affected",
"version": "9.12.2.9"
},
{
"status": "affected",
"version": "9.12.3"
},
{
"status": "affected",
"version": "9.12.3.2"
},
{
"status": "affected",
"version": "9.12.3.7"
},
{
"status": "affected",
"version": "9.12.4"
},
{
"status": "affected",
"version": "9.12.3.12"
},
{
"status": "affected",
"version": "9.12.3.9"
},
{
"status": "affected",
"version": "9.12.2.1"
},
{
"status": "affected",
"version": "9.12.4.2"
},
{
"status": "affected",
"version": "9.12.4.4"
},
{
"status": "affected",
"version": "9.12.4.7"
},
{
"status": "affected",
"version": "9.12.4.10"
},
{
"status": "affected",
"version": "9.12.4.13"
},
{
"status": "affected",
"version": "9.12.4.8"
},
{
"status": "affected",
"version": "9.12.4.18"
},
{
"status": "affected",
"version": "9.12.4.24"
},
{
"status": "affected",
"version": "9.12.4.26"
},
{
"status": "affected",
"version": "9.12.4.29"
},
{
"status": "affected",
"version": "9.12.4.30"
},
{
"status": "affected",
"version": "9.12.4.35"
},
{
"status": "affected",
"version": "9.12.4.37"
},
{
"status": "affected",
"version": "9.12.4.38"
},
{
"status": "affected",
"version": "9.12.4.39"
},
{
"status": "affected",
"version": "9.12.4.40"
},
{
"status": "affected",
"version": "9.12.4.41"
},
{
"status": "affected",
"version": "9.12.4.47"
},
{
"status": "affected",
"version": "9.12.4.48"
},
{
"status": "affected",
"version": "9.12.4.50"
},
{
"status": "affected",
"version": "9.12.4.52"
},
{
"status": "affected",
"version": "9.12.4.54"
},
{
"status": "affected",
"version": "9.12.4.55"
},
{
"status": "affected",
"version": "9.12.4.56"
},
{
"status": "affected",
"version": "9.12.4.58"
},
{
"status": "affected",
"version": "9.12.4.62"
},
{
"status": "affected",
"version": "9.12.4.65"
},
{
"status": "affected",
"version": "9.12.4.67"
},
{
"status": "affected",
"version": "9.16.1"
},
{
"status": "affected",
"version": "9.16.1.28"
},
{
"status": "affected",
"version": "9.16.2"
},
{
"status": "affected",
"version": "9.16.2.3"
},
{
"status": "affected",
"version": "9.16.2.7"
},
{
"status": "affected",
"version": "9.16.2.11"
},
{
"status": "affected",
"version": "9.16.2.13"
},
{
"status": "affected",
"version": "9.16.2.14"
},
{
"status": "affected",
"version": "9.16.3"
},
{
"status": "affected",
"version": "9.16.3.3"
},
{
"status": "affected",
"version": "9.16.3.14"
},
{
"status": "affected",
"version": "9.16.3.15"
},
{
"status": "affected",
"version": "9.16.3.19"
},
{
"status": "affected",
"version": "9.16.3.23"
},
{
"status": "affected",
"version": "9.16.4"
},
{
"status": "affected",
"version": "9.16.4.9"
},
{
"status": "affected",
"version": "9.16.4.14"
},
{
"status": "affected",
"version": "9.16.4.19"
},
{
"status": "affected",
"version": "9.16.4.27"
},
{
"status": "affected",
"version": "9.16.4.38"
},
{
"status": "affected",
"version": "9.16.4.39"
},
{
"status": "affected",
"version": "9.16.4.42"
},
{
"status": "affected",
"version": "9.16.4.48"
},
{
"status": "affected",
"version": "9.16.4.55"
},
{
"status": "affected",
"version": "9.16.4.57"
},
{
"status": "affected",
"version": "9.16.4.61"
},
{
"status": "affected",
"version": "9.16.4.62"
},
{
"status": "affected",
"version": "9.16.4.67"
},
{
"status": "affected",
"version": "9.16.4.70"
},
{
"status": "affected",
"version": "9.16.4.71"
},
{
"status": "affected",
"version": "9.16.4.76"
},
{
"status": "affected",
"version": "9.16.4.82"
},
{
"status": "affected",
"version": "9.16.4.84"
},
{
"status": "affected",
"version": "9.16.4.85"
},
{
"status": "affected",
"version": "9.17.1"
},
{
"status": "affected",
"version": "9.17.1.7"
},
{
"status": "affected",
"version": "9.17.1.9"
},
{
"status": "affected",
"version": "9.17.1.10"
},
{
"status": "affected",
"version": "9.17.1.11"
},
{
"status": "affected",
"version": "9.17.1.13"
},
{
"status": "affected",
"version": "9.17.1.15"
},
{
"status": "affected",
"version": "9.17.1.20"
},
{
"status": "affected",
"version": "9.17.1.30"
},
{
"status": "affected",
"version": "9.17.1.33"
},
{
"status": "affected",
"version": "9.17.1.39"
},
{
"status": "affected",
"version": "9.17.1.45"
},
{
"status": "affected",
"version": "9.17.1.46"
},
{
"status": "affected",
"version": "9.18.1"
},
{
"status": "affected",
"version": "9.18.1.3"
},
{
"status": "affected",
"version": "9.18.2"
},
{
"status": "affected",
"version": "9.18.2.5"
},
{
"status": "affected",
"version": "9.18.2.7"
},
{
"status": "affected",
"version": "9.18.2.8"
},
{
"status": "affected",
"version": "9.18.3"
},
{
"status": "affected",
"version": "9.18.3.39"
},
{
"status": "affected",
"version": "9.18.3.46"
},
{
"status": "affected",
"version": "9.18.3.53"
},
{
"status": "affected",
"version": "9.18.3.55"
},
{
"status": "affected",
"version": "9.18.3.56"
},
{
"status": "affected",
"version": "9.18.4"
},
{
"status": "affected",
"version": "9.18.4.5"
},
{
"status": "affected",
"version": "9.18.4.8"
},
{
"status": "affected",
"version": "9.18.4.22"
},
{
"status": "affected",
"version": "9.18.4.24"
},
{
"status": "affected",
"version": "9.18.4.29"
},
{
"status": "affected",
"version": "9.18.4.34"
},
{
"status": "affected",
"version": "9.18.4.40"
},
{
"status": "affected",
"version": "9.18.4.47"
},
{
"status": "affected",
"version": "9.18.4.50"
},
{
"status": "affected",
"version": "9.18.4.52"
},
{
"status": "affected",
"version": "9.18.4.53"
},
{
"status": "affected",
"version": "9.18.4.57"
},
{
"status": "affected",
"version": "9.18.4.66"
},
{
"status": "affected",
"version": "9.18.4.67"
},
{
"status": "affected",
"version": "9.18.4.68"
},
{
"status": "affected",
"version": "9.19.1"
},
{
"status": "affected",
"version": "9.19.1.5"
},
{
"status": "affected",
"version": "9.19.1.9"
},
{
"status": "affected",
"version": "9.19.1.12"
},
{
"status": "affected",
"version": "9.19.1.18"
},
{
"status": "affected",
"version": "9.19.1.22"
},
{
"status": "affected",
"version": "9.19.1.24"
},
{
"status": "affected",
"version": "9.19.1.27"
},
{
"status": "affected",
"version": "9.19.1.28"
},
{
"status": "affected",
"version": "9.19.1.31"
},
{
"status": "affected",
"version": "9.19.1.37"
},
{
"status": "affected",
"version": "9.19.1.38"
},
{
"status": "affected",
"version": "9.19.1.42"
},
{
"status": "affected",
"version": "9.20.1"
},
{
"status": "affected",
"version": "9.20.1.5"
},
{
"status": "affected",
"version": "9.20.2"
},
{
"status": "affected",
"version": "9.20.2.10"
},
{
"status": "affected",
"version": "9.20.2.21"
},
{
"status": "affected",
"version": "9.20.2.22"
},
{
"status": "affected",
"version": "9.20.3"
},
{
"status": "affected",
"version": "9.20.3.4"
},
{
"status": "affected",
"version": "9.20.3.7"
},
{
"status": "affected",
"version": "9.20.3.9"
},
{
"status": "affected",
"version": "9.20.3.10"
},
{
"status": "affected",
"version": "9.20.3.13"
},
{
"status": "affected",
"version": "9.20.3.16"
},
{
"status": "affected",
"version": "9.20.3.20"
},
{
"status": "affected",
"version": "9.20.4"
},
{
"status": "affected",
"version": "9.20.4.7"
},
{
"status": "affected",
"version": "9.20.4.10"
},
{
"status": "affected",
"version": "9.20.4.14"
},
{
"status": "affected",
"version": "9.22.1.1"
},
{
"status": "affected",
"version": "9.22.1.3"
},
{
"status": "affected",
"version": "9.22.1.2"
},
{
"status": "affected",
"version": "9.22.1.6"
},
{
"status": "affected",
"version": "9.22.2"
},
{
"status": "affected",
"version": "9.22.2.4"
},
{
"status": "affected",
"version": "9.22.2.9"
},
{
"status": "affected",
"version": "9.22.2.13"
},
{
"status": "affected",
"version": "9.22.2.14"
},
{
"status": "affected",
"version": "9.23.1"
},
{
"status": "affected",
"version": "9.23.1.3"
},
{
"status": "affected",
"version": "9.23.1.7"
},
{
"status": "affected",
"version": "9.23.1.13"
},
{
"status": "affected",
"version": "9.23.1.19"
},
{
"status": "affected",
"version": "9.23.1.22"
}
]
},
{
"product": "Cisco Secure Firewall Threat Defense (FTD) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.4.0"
},
{
"status": "affected",
"version": "6.4.0.1"
},
{
"status": "affected",
"version": "6.4.0.3"
},
{
"status": "affected",
"version": "6.4.0.2"
},
{
"status": "affected",
"version": "6.4.0.4"
},
{
"status": "affected",
"version": "6.4.0.5"
},
{
"status": "affected",
"version": "6.4.0.6"
},
{
"status": "affected",
"version": "6.4.0.7"
},
{
"status": "affected",
"version": "6.4.0.8"
},
{
"status": "affected",
"version": "6.4.0.9"
},
{
"status": "affected",
"version": "6.4.0.10"
},
{
"status": "affected",
"version": "6.4.0.11"
},
{
"status": "affected",
"version": "6.4.0.12"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.0.8"
},
{
"status": "affected",
"version": "7.0.8.1"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.2.10"
},
{
"status": "affected",
"version": "7.2.10.2"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.4.2.3"
},
{
"status": "affected",
"version": "7.4.2.4"
},
{
"status": "affected",
"version": "7.4.3"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.6.2.1"
},
{
"status": "affected",
"version": "7.7.0"
},
{
"status": "affected",
"version": "7.7.10"
},
{
"status": "affected",
"version": "7.7.10.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "LOW",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-401",
"description": "Missing Release of Memory after Effective Lifetime",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T18:35:06.717Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW"
}
],
"source": {
"advisory": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"defects": [
"CSCwn69079"
],
"discovery": "INTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20021",
"datePublished": "2026-03-04T18:35:06.717Z",
"dateReserved": "2025-10-08T11:59:15.352Z",
"dateUpdated": "2026-03-04T21:30:11.471Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-20021",
"date": "2026-09-26",
"epss": "0.00203",
"percentile": "0.09263"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "9.12.1"
},
{
"status": "affected",
"version": "9.12.1.2"
},
{
"status": "affected",
"version": "9.12.1.3"
},
{
"status": "affected",
"version": "9.12.2"
},
{
"status": "affected",
"version": "9.12.2.4"
},
{
"status": "affected",
"version": "9.12.2.5"
},
{
"status": "affected",
"version": "9.12.2.9"
},
{
"status": "affected",
"version": "9.12.3"
},
{
"status": "affected",
"version": "9.12.3.2"
},
{
"status": "affected",
"version": "9.12.3.7"
},
{
"status": "affected",
"version": "9.12.4"
},
{
"status": "affected",
"version": "9.12.3.12"
},
{
"status": "affected",
"version": "9.12.3.9"
},
{
"status": "affected",
"version": "9.12.2.1"
},
{
"status": "affected",
"version": "9.12.4.2"
},
{
"status": "affected",
"version": "9.12.4.4"
},
{
"status": "affected",
"version": "9.12.4.7"
},
{
"status": "affected",
"version": "9.12.4.10"
},
{
"status": "affected",
"version": "9.12.4.13"
},
{
"status": "affected",
"version": "9.12.4.8"
},
{
"status": "affected",
"version": "9.12.4.18"
},
{
"status": "affected",
"version": "9.12.4.24"
},
{
"status": "affected",
"version": "9.12.4.26"
},
{
"status": "affected",
"version": "9.12.4.29"
},
{
"status": "affected",
"version": "9.12.4.30"
},
{
"status": "affected",
"version": "9.12.4.35"
},
{
"status": "affected",
"version": "9.12.4.37"
},
{
"status": "affected",
"version": "9.12.4.38"
},
{
"status": "affected",
"version": "9.12.4.39"
},
{
"status": "affected",
"version": "9.12.4.40"
},
{
"status": "affected",
"version": "9.12.4.41"
},
{
"status": "affected",
"version": "9.12.4.47"
},
{
"status": "affected",
"version": "9.12.4.48"
},
{
"status": "affected",
"version": "9.12.4.50"
},
{
"status": "affected",
"version": "9.12.4.52"
},
{
"status": "affected",
"version": "9.12.4.54"
},
{
"status": "affected",
"version": "9.12.4.55"
},
{
"status": "affected",
"version": "9.12.4.56"
},
{
"status": "affected",
"version": "9.12.4.58"
},
{
"status": "affected",
"version": "9.12.4.62"
},
{
"status": "affected",
"version": "9.12.4.65"
},
{
"status": "affected",
"version": "9.12.4.67"
},
{
"status": "affected",
"version": "9.16.1"
},
{
"status": "affected",
"version": "9.16.1.28"
},
{
"status": "affected",
"version": "9.16.2"
},
{
"status": "affected",
"version": "9.16.2.3"
},
{
"status": "affected",
"version": "9.16.2.7"
},
{
"status": "affected",
"version": "9.16.2.11"
},
{
"status": "affected",
"version": "9.16.2.13"
},
{
"status": "affected",
"version": "9.16.2.14"
},
{
"status": "affected",
"version": "9.16.3"
},
{
"status": "affected",
"version": "9.16.3.3"
},
{
"status": "affected",
"version": "9.16.3.14"
},
{
"status": "affected",
"version": "9.16.3.15"
},
{
"status": "affected",
"version": "9.16.3.19"
},
{
"status": "affected",
"version": "9.16.3.23"
},
{
"status": "affected",
"version": "9.16.4"
},
{
"status": "affected",
"version": "9.16.4.9"
},
{
"status": "affected",
"version": "9.16.4.14"
},
{
"status": "affected",
"version": "9.16.4.19"
},
{
"status": "affected",
"version": "9.16.4.27"
},
{
"status": "affected",
"version": "9.16.4.38"
},
{
"status": "affected",
"version": "9.16.4.39"
},
{
"status": "affected",
"version": "9.16.4.42"
},
{
"status": "affected",
"version": "9.16.4.48"
},
{
"status": "affected",
"version": "9.16.4.55"
},
{
"status": "affected",
"version": "9.16.4.57"
},
{
"status": "affected",
"version": "9.16.4.61"
},
{
"status": "affected",
"version": "9.16.4.62"
},
{
"status": "affected",
"version": "9.16.4.67"
},
{
"status": "affected",
"version": "9.16.4.70"
},
{
"status": "affected",
"version": "9.16.4.71"
},
{
"status": "affected",
"version": "9.16.4.76"
},
{
"status": "affected",
"version": "9.16.4.82"
},
{
"status": "affected",
"version": "9.16.4.84"
},
{
"status": "affected",
"version": "9.16.4.85"
},
{
"status": "affected",
"version": "9.17.1"
},
{
"status": "affected",
"version": "9.17.1.7"
},
{
"status": "affected",
"version": "9.17.1.9"
},
{
"status": "affected",
"version": "9.17.1.10"
},
{
"status": "affected",
"version": "9.17.1.11"
},
{
"status": "affected",
"version": "9.17.1.13"
},
{
"status": "affected",
"version": "9.17.1.15"
},
{
"status": "affected",
"version": "9.17.1.20"
},
{
"status": "affected",
"version": "9.17.1.30"
},
{
"status": "affected",
"version": "9.17.1.33"
},
{
"status": "affected",
"version": "9.17.1.39"
},
{
"status": "affected",
"version": "9.17.1.45"
},
{
"status": "affected",
"version": "9.17.1.46"
},
{
"status": "affected",
"version": "9.18.1"
},
{
"status": "affected",
"version": "9.18.1.3"
},
{
"status": "affected",
"version": "9.18.2"
},
{
"status": "affected",
"version": "9.18.2.5"
},
{
"status": "affected",
"version": "9.18.2.7"
},
{
"status": "affected",
"version": "9.18.2.8"
},
{
"status": "affected",
"version": "9.18.3"
},
{
"status": "affected",
"version": "9.18.3.39"
},
{
"status": "affected",
"version": "9.18.3.46"
},
{
"status": "affected",
"version": "9.18.3.53"
},
{
"status": "affected",
"version": "9.18.3.55"
},
{
"status": "affected",
"version": "9.18.3.56"
},
{
"status": "affected",
"version": "9.18.4"
},
{
"status": "affected",
"version": "9.18.4.5"
},
{
"status": "affected",
"version": "9.18.4.8"
},
{
"status": "affected",
"version": "9.18.4.22"
},
{
"status": "affected",
"version": "9.18.4.24"
},
{
"status": "affected",
"version": "9.18.4.29"
},
{
"status": "affected",
"version": "9.18.4.34"
},
{
"status": "affected",
"version": "9.18.4.40"
},
{
"status": "affected",
"version": "9.18.4.47"
},
{
"status": "affected",
"version": "9.18.4.50"
},
{
"status": "affected",
"version": "9.18.4.52"
},
{
"status": "affected",
"version": "9.18.4.53"
},
{
"status": "affected",
"version": "9.18.4.57"
},
{
"status": "affected",
"version": "9.18.4.66"
},
{
"status": "affected",
"version": "9.18.4.67"
},
{
"status": "affected",
"version": "9.18.4.68"
},
{
"status": "affected",
"version": "9.19.1"
},
{
"status": "affected",
"version": "9.19.1.5"
},
{
"status": "affected",
"version": "9.19.1.9"
},
{
"status": "affected",
"version": "9.19.1.12"
},
{
"status": "affected",
"version": "9.19.1.18"
},
{
"status": "affected",
"version": "9.19.1.22"
},
{
"status": "affected",
"version": "9.19.1.24"
},
{
"status": "affected",
"version": "9.19.1.27"
},
{
"status": "affected",
"version": "9.19.1.28"
},
{
"status": "affected",
"version": "9.19.1.31"
},
{
"status": "affected",
"version": "9.19.1.37"
},
{
"status": "affected",
"version": "9.19.1.38"
},
{
"status": "affected",
"version": "9.19.1.42"
},
{
"status": "affected",
"version": "9.20.1"
},
{
"status": "affected",
"version": "9.20.1.5"
},
{
"status": "affected",
"version": "9.20.2"
},
{
"status": "affected",
"version": "9.20.2.10"
},
{
"status": "affected",
"version": "9.20.2.21"
},
{
"status": "affected",
"version": "9.20.2.22"
},
{
"status": "affected",
"version": "9.20.3"
},
{
"status": "affected",
"version": "9.20.3.4"
},
{
"status": "affected",
"version": "9.20.3.7"
},
{
"status": "affected",
"version": "9.20.3.9"
},
{
"status": "affected",
"version": "9.20.3.10"
},
{
"status": "affected",
"version": "9.20.3.13"
},
{
"status": "affected",
"version": "9.20.3.16"
},
{
"status": "affected",
"version": "9.20.3.20"
},
{
"status": "affected",
"version": "9.20.4"
},
{
"status": "affected",
"version": "9.20.4.7"
},
{
"status": "affected",
"version": "9.20.4.10"
},
{
"status": "affected",
"version": "9.20.4.14"
},
{
"status": "affected",
"version": "9.22.1.1"
},
{
"status": "affected",
"version": "9.22.1.3"
},
{
"status": "affected",
"version": "9.22.1.2"
},
{
"status": "affected",
"version": "9.22.1.6"
},
{
"status": "affected",
"version": "9.22.2"
},
{
"status": "affected",
"version": "9.22.2.4"
},
{
"status": "affected",
"version": "9.22.2.9"
},
{
"status": "affected",
"version": "9.22.2.13"
},
{
"status": "affected",
"version": "9.22.2.14"
},
{
"status": "affected",
"version": "9.23.1"
},
{
"status": "affected",
"version": "9.23.1.3"
},
{
"status": "affected",
"version": "9.23.1.7"
},
{
"status": "affected",
"version": "9.23.1.13"
},
{
"status": "affected",
"version": "9.23.1.19"
},
{
"status": "affected",
"version": "9.23.1.22"
}
]
},
{
"product": "Cisco Secure Firewall Threat Defense (FTD) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.4.0"
},
{
"status": "affected",
"version": "6.4.0.1"
},
{
"status": "affected",
"version": "6.4.0.3"
},
{
"status": "affected",
"version": "6.4.0.2"
},
{
"status": "affected",
"version": "6.4.0.4"
},
{
"status": "affected",
"version": "6.4.0.5"
},
{
"status": "affected",
"version": "6.4.0.6"
},
{
"status": "affected",
"version": "6.4.0.7"
},
{
"status": "affected",
"version": "6.4.0.8"
},
{
"status": "affected",
"version": "6.4.0.9"
},
{
"status": "affected",
"version": "6.4.0.10"
},
{
"status": "affected",
"version": "6.4.0.11"
},
{
"status": "affected",
"version": "6.4.0.12"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.0.8"
},
{
"status": "affected",
"version": "7.0.8.1"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.2.10"
},
{
"status": "affected",
"version": "7.2.10.2"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.4.2.3"
},
{
"status": "affected",
"version": "7.4.2.4"
},
{
"status": "affected",
"version": "7.4.3"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.6.2.1"
},
{
"status": "affected",
"version": "7.7.0"
},
{
"status": "affected",
"version": "7.7.10"
},
{
"status": "affected",
"version": "7.7.10.1"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E19306D0-10B5-43DE-8AA4-7F245F9F2797",
"versionEndIncluding": "9.12.4.67",
"versionStartIncluding": "9.12.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C1EE3F40-E21C-4604-8E5F-56C2126F4384",
"versionEndIncluding": "9.16.4.85",
"versionStartIncluding": "9.16.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1DE10C66-EC3C-482C-A8E7-2F19DC30E434",
"versionEndIncluding": "9.17.1.46",
"versionStartIncluding": "9.17.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8A97D374-5334-469D-AB27-D8F7B85DE69F",
"versionEndIncluding": "9.18.4.68",
"versionStartIncluding": "9.18.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8F2DBD2A-57A4-4DB1-8DF9-DA777382865B",
"versionEndIncluding": "9.19.1.42",
"versionStartIncluding": "9.19.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7B0958D9-D3ED-428A-A6D3-7CEB589A743E",
"versionEndIncluding": "9.20.4.14",
"versionStartIncluding": "9.20.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C057D2D3-0535-4E82-81AD-939B9DC2F07D",
"versionEndIncluding": "9.22.2.14",
"versionStartIncluding": "9.22.1.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CBE65F68-D239-413F-BDDF-A976387338B1",
"versionEndIncluding": "9.23.1.22",
"versionStartIncluding": "9.23.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C3390AB1-6585-4F1B-910E-C42FF7CCFC1B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "3B0504E5-72EB-4B3B-A7FC-73335EA8FA18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.2:*:*:*:*:*:*:*",
"matchCriteriaId": "E0E00681-152D-42E7-8916-5953F24F9510",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.3:*:*:*:*:*:*:*",
"matchCriteriaId": "64F272C2-9D4D-4F0A-AA8C-C94C2BB3133A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.4:*:*:*:*:*:*:*",
"matchCriteriaId": "E3E37219-E266-4C3A-AAA0-B22E6D0EC417",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.5:*:*:*:*:*:*:*",
"matchCriteriaId": "311280C3-C440-4ADD-BEDE-28FCC644BA00",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.6:*:*:*:*:*:*:*",
"matchCriteriaId": "F7065AD6-4AB9-4845-9033-E2FEE0B08B86",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.7:*:*:*:*:*:*:*",
"matchCriteriaId": "5B17EE4A-E715-43E6-9B71-96AEF77A5D3C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.8:*:*:*:*:*:*:*",
"matchCriteriaId": "0D560AE4-3235-4E43-AAB4-C4EC3E51778A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.9:*:*:*:*:*:*:*",
"matchCriteriaId": "2CBB9A94-B11B-4E26-BF12-C18BA1E358AB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.10:*:*:*:*:*:*:*",
"matchCriteriaId": "52AEBBAD-67AA-4F32-ADF6-22FF8E921F07",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.11:*:*:*:*:*:*:*",
"matchCriteriaId": "F7241959-2F20-4A1F-92DE-64B80118617B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.12:*:*:*:*:*:*:*",
"matchCriteriaId": "5B8CB73A-FEDA-4834-B33C-41E123673CDD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.13:*:*:*:*:*:*:*",
"matchCriteriaId": "0099595B-A0E6-4417-8C30-58A63014F1FF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.14:*:*:*:*:*:*:*",
"matchCriteriaId": "9E2A9D74-3C7F-4B87-98AB-19DA02A04F43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.15:*:*:*:*:*:*:*",
"matchCriteriaId": "4A54FA96-124E-462D-885D-837458D51901",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.16:*:*:*:*:*:*:*",
"matchCriteriaId": "E561D969-16B1-4F7F-BDF0-314884E8F844",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.17:*:*:*:*:*:*:*",
"matchCriteriaId": "193F2ECD-ACF9-4546-B20C-CD627EFF96E4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:6.4.0.18:*:*:*:*:*:*:*",
"matchCriteriaId": "67E14A7A-30AB-4DB0-8A24-BE74C14E7180",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "604568DA-466A-47C0-8229-C7F1A10FCDE9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "FF19A26F-B257-4932-ADF5-3B585D6B5100",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "893B1060-336A-48B7-BF96-16D6A6752F44",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1.1:*:*:*:*:*:*:*",
"matchCriteriaId": "479976B9-5B58-4A84-88C5-D81074DC98B2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2:*:*:*:*:*:*:*",
"matchCriteriaId": "B3232A07-4B12-4681-BE61-9FCEEBE2A1F6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "1A904332-0AAD-4C6B-9D52-509A9A8B8D51",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.3:*:*:*:*:*:*:*",
"matchCriteriaId": "1137D6CB-618A-488E-A0A9-C98C8A7CE2EE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.4:*:*:*:*:*:*:*",
"matchCriteriaId": "241A1DC5-7DCB-46D8-98E5-7CDD43968A64",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.5:*:*:*:*:*:*:*",
"matchCriteriaId": "32290AE7-B7CF-4AF9-ACB0-6672D7E6B8C8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6:*:*:*:*:*:*:*",
"matchCriteriaId": "CD417D1D-14B8-46AC-B7DD-35C6565E95C6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.1:*:*:*:*:*:*:*",
"matchCriteriaId": "BAE72052-C1B0-4897-8303-BC0EFB3857D9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.2:*:*:*:*:*:*:*",
"matchCriteriaId": "36B7CF16-59A9-4298-90D8-1F4F5988F887",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.3:*:*:*:*:*:*:*",
"matchCriteriaId": "32C88FF8-D75D-4B9B-B30E-F6D02C66533B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.7:*:*:*:*:*:*:*",
"matchCriteriaId": "A13ED6C4-8C19-4183-8CD7-12BFDF4FE8EF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.8:*:*:*:*:*:*:*",
"matchCriteriaId": "8B511E79-2B1F-4948-9ED4-8F93ACBE68B3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.8.1:*:*:*:*:*:*:*",
"matchCriteriaId": "D2865FCF-3B69-4629-8DCA-F4C63567B5FB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0:*:*:*:*:*:*:*",
"matchCriteriaId": "3AD3F514-9FBC-403C-8F8F-2507708D685F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "2155D80A-74AE-4403-8EC4-19054DE3476E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.2:*:*:*:*:*:*:*",
"matchCriteriaId": "C69CE022-5FBF-48AE-B6AA-873261A201D1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.3:*:*:*:*:*:*:*",
"matchCriteriaId": "30F5FE5C-E3BE-4C32-BB6F-E3785BA6CD15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:*:*:*:*:*:*:*",
"matchCriteriaId": "237462A2-E0CF-4201-9115-D94910F9745B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "2CA2F5B0-0106-4FF2-91BD-AEF3F064F69E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "EF9FFE56-9A00-456E-B097-114F714133BD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.2:*:*:*:*:*:*:*",
"matchCriteriaId": "0E253A08-B4D4-4E81-9D5A-C15D198C43AC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.3:*:*:*:*:*:*:*",
"matchCriteriaId": "59C7F868-1571-44CC-90E1-7A5EA01E63FC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4:*:*:*:*:*:*:*",
"matchCriteriaId": "7432B6F9-03CD-4373-B281-2A09864E7828",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4.1:*:*:*:*:*:*:*",
"matchCriteriaId": "3D42B7E6-71ED-48BA-B11F-6791FE96C1B2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5:*:*:*:*:*:*:*",
"matchCriteriaId": "39CC3AC6-6F75-43BF-BBC9-F74AADB74716",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.1:*:*:*:*:*:*:*",
"matchCriteriaId": "FFBAC033-FF89-4581-92F6-EA4FFEE40F54",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.2:*:*:*:*:*:*:*",
"matchCriteriaId": "5AF3CB27-8315-452F-80E1-5DAF883319B1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.6:*:*:*:*:*:*:*",
"matchCriteriaId": "7A910367-E5D5-4817-9DAA-3225D4FA8055",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.7:*:*:*:*:*:*:*",
"matchCriteriaId": "38EC17C6-2DA5-4E26-987A-FD14F539F55B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8:*:*:*:*:*:*:*",
"matchCriteriaId": "25E3D7DE-90EB-4531-BD7D-738637A83CD4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8.1:*:*:*:*:*:*:*",
"matchCriteriaId": "4E7FE2B9-65C0-4F7F-8810-72BFE861C521",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.9:*:*:*:*:*:*:*",
"matchCriteriaId": "839E56CB-B466-4A38-A6E0-EBF27AA46315",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.10:*:*:*:*:*:*:*",
"matchCriteriaId": "A90CFCD8-F873-4BEB-8193-97B62DB7FDA5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.10.2:*:*:*:*:*:*:*",
"matchCriteriaId": "677E2330-7FB5-4D91-9543-4941A8BE6A38",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DD33999C-8DE7-4C0C-A8E5-1BA7127E36FE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:*:*:*:*:*:*:*",
"matchCriteriaId": "A977F379-2F93-4A56-B0A6-C45AEF274123",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.1:*:*:*:*:*:*:*",
"matchCriteriaId": "DA7FA3B6-D630-42E3-B69F-B20D38B33531",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.2:*:*:*:*:*:*:*",
"matchCriteriaId": "9B125CC4-0DAE-4C26-9A27-2532BB09EA8A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "5BC88149-095A-41DE-AA27-1CFD21125EF4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1:*:*:*:*:*:*:*",
"matchCriteriaId": "BA983223-35AE-4D2F-B2F5-BA0614908C3B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1.1:*:*:*:*:*:*:*",
"matchCriteriaId": "17A31A33-2E84-4C79-86BD-1E9FF4C1DD09",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2:*:*:*:*:*:*:*",
"matchCriteriaId": "B58DC884-9430-49D4-AA8B-7FEB7505B7A8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "5EC075D4-0033-46ED-9E55-576997424382",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2.2:*:*:*:*:*:*:*",
"matchCriteriaId": "EA94FBB2-E095-48A3-BA39-5C2EC01D0ACA",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2.3:*:*:*:*:*:*:*",
"matchCriteriaId": "D61D406F-6796-4E90-A954-285F6A3785AC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.2.4:*:*:*:*:*:*:*",
"matchCriteriaId": "24DA7AE5-6288-4901-B9C9-36DF3788AA9B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.3:*:*:*:*:*:*:*",
"matchCriteriaId": "55A60A76-D206-43B2-B6B1-94757FB3E258",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.0:*:*:*:*:*:*:*",
"matchCriteriaId": "E91D9CAD-174A-4AAE-AB14-BD3110F9CFA1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.1:*:*:*:*:*:*:*",
"matchCriteriaId": "8EC515FD-4D9A-428D-9E72-9014C613A0E7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.2:*:*:*:*:*:*:*",
"matchCriteriaId": "5B53EBBB-8E55-4D94-ADD3-C93630E09241",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "D9033AA9-2481-406A-8FBD-C671D3888D98",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.7.0:*:*:*:*:*:*:*",
"matchCriteriaId": "2F843EFD-0130-45F0-A212-9921879F3CBE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.7.10:*:*:*:*:*:*:*",
"matchCriteriaId": "47EFC734-E450-4606-939A-86BE0F7FC5E4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.7.10.1:*:*:*:*:*:*:*",
"matchCriteriaId": "814577AF-98E9-49A8-8F1C-BF938D4F1F29",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition."
},
{
"lang": "es",
"value": "Una vulnerabilidad en el protocolo OSPF del software Cisco Secure Firewall Adaptive Security Appliance (ASA) y del software Cisco Secure Firewall Threat Defense (FTD) podr\u00eda permitir a un atacante autenticado y adyacente agotar la memoria en un dispositivo afectado, lo que resultar\u00eda en una condici\u00f3n de denegaci\u00f3n de servicio (DoS).\nEsta vulnerabilidad se debe a la validaci\u00f3n incorrecta de la entrada por parte del protocolo OSPF al analizar paquetes. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes OSPF manipulados a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante agotar la memoria en el dispositivo afectado, lo que resultar\u00eda en una condici\u00f3n de DoS."
}
],
"id": "CVE-2026-20021",
"lastModified": "2026-08-11T19:40:47.230",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "LOW",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 1.4,
"source": "psirt@cisco.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20021",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-04T21:29:56.096429Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-03-04T19:16:12.150",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T08:10:03+00:00",
"cve": "CVE-2026-20021",
"id": "CVE-2026-20021",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2026-20021",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20021.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20021",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-04T21:29:56.096429Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T21:30:06.900Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "9.12.1"
},
{
"status": "affected",
"version": "9.12.1.2"
},
{
"status": "affected",
"version": "9.12.1.3"
},
{
"status": "affected",
"version": "9.12.2"
},
{
"status": "affected",
"version": "9.12.2.4"
},
{
"status": "affected",
"version": "9.12.2.5"
},
{
"status": "affected",
"version": "9.12.2.9"
},
{
"status": "affected",
"version": "9.12.3"
},
{
"status": "affected",
"version": "9.12.3.2"
},
{
"status": "affected",
"version": "9.12.3.7"
},
{
"status": "affected",
"version": "9.12.4"
},
{
"status": "affected",
"version": "9.12.3.12"
},
{
"status": "affected",
"version": "9.12.3.9"
},
{
"status": "affected",
"version": "9.12.2.1"
},
{
"status": "affected",
"version": "9.12.4.2"
},
{
"status": "affected",
"version": "9.12.4.4"
},
{
"status": "affected",
"version": "9.12.4.7"
},
{
"status": "affected",
"version": "9.12.4.10"
},
{
"status": "affected",
"version": "9.12.4.13"
},
{
"status": "affected",
"version": "9.12.4.8"
},
{
"status": "affected",
"version": "9.12.4.18"
},
{
"status": "affected",
"version": "9.12.4.24"
},
{
"status": "affected",
"version": "9.12.4.26"
},
{
"status": "affected",
"version": "9.12.4.29"
},
{
"status": "affected",
"version": "9.12.4.30"
},
{
"status": "affected",
"version": "9.12.4.35"
},
{
"status": "affected",
"version": "9.12.4.37"
},
{
"status": "affected",
"version": "9.12.4.38"
},
{
"status": "affected",
"version": "9.12.4.39"
},
{
"status": "affected",
"version": "9.12.4.40"
},
{
"status": "affected",
"version": "9.12.4.41"
},
{
"status": "affected",
"version": "9.12.4.47"
},
{
"status": "affected",
"version": "9.12.4.48"
},
{
"status": "affected",
"version": "9.12.4.50"
},
{
"status": "affected",
"version": "9.12.4.52"
},
{
"status": "affected",
"version": "9.12.4.54"
},
{
"status": "affected",
"version": "9.12.4.55"
},
{
"status": "affected",
"version": "9.12.4.56"
},
{
"status": "affected",
"version": "9.12.4.58"
},
{
"status": "affected",
"version": "9.12.4.62"
},
{
"status": "affected",
"version": "9.12.4.65"
},
{
"status": "affected",
"version": "9.12.4.67"
},
{
"status": "affected",
"version": "9.16.1"
},
{
"status": "affected",
"version": "9.16.1.28"
},
{
"status": "affected",
"version": "9.16.2"
},
{
"status": "affected",
"version": "9.16.2.3"
},
{
"status": "affected",
"version": "9.16.2.7"
},
{
"status": "affected",
"version": "9.16.2.11"
},
{
"status": "affected",
"version": "9.16.2.13"
},
{
"status": "affected",
"version": "9.16.2.14"
},
{
"status": "affected",
"version": "9.16.3"
},
{
"status": "affected",
"version": "9.16.3.3"
},
{
"status": "affected",
"version": "9.16.3.14"
},
{
"status": "affected",
"version": "9.16.3.15"
},
{
"status": "affected",
"version": "9.16.3.19"
},
{
"status": "affected",
"version": "9.16.3.23"
},
{
"status": "affected",
"version": "9.16.4"
},
{
"status": "affected",
"version": "9.16.4.9"
},
{
"status": "affected",
"version": "9.16.4.14"
},
{
"status": "affected",
"version": "9.16.4.19"
},
{
"status": "affected",
"version": "9.16.4.27"
},
{
"status": "affected",
"version": "9.16.4.38"
},
{
"status": "affected",
"version": "9.16.4.39"
},
{
"status": "affected",
"version": "9.16.4.42"
},
{
"status": "affected",
"version": "9.16.4.48"
},
{
"status": "affected",
"version": "9.16.4.55"
},
{
"status": "affected",
"version": "9.16.4.57"
},
{
"status": "affected",
"version": "9.16.4.61"
},
{
"status": "affected",
"version": "9.16.4.62"
},
{
"status": "affected",
"version": "9.16.4.67"
},
{
"status": "affected",
"version": "9.16.4.70"
},
{
"status": "affected",
"version": "9.16.4.71"
},
{
"status": "affected",
"version": "9.16.4.76"
},
{
"status": "affected",
"version": "9.16.4.82"
},
{
"status": "affected",
"version": "9.16.4.84"
},
{
"status": "affected",
"version": "9.16.4.85"
},
{
"status": "affected",
"version": "9.17.1"
},
{
"status": "affected",
"version": "9.17.1.7"
},
{
"status": "affected",
"version": "9.17.1.9"
},
{
"status": "affected",
"version": "9.17.1.10"
},
{
"status": "affected",
"version": "9.17.1.11"
},
{
"status": "affected",
"version": "9.17.1.13"
},
{
"status": "affected",
"version": "9.17.1.15"
},
{
"status": "affected",
"version": "9.17.1.20"
},
{
"status": "affected",
"version": "9.17.1.30"
},
{
"status": "affected",
"version": "9.17.1.33"
},
{
"status": "affected",
"version": "9.17.1.39"
},
{
"status": "affected",
"version": "9.17.1.45"
},
{
"status": "affected",
"version": "9.17.1.46"
},
{
"status": "affected",
"version": "9.18.1"
},
{
"status": "affected",
"version": "9.18.1.3"
},
{
"status": "affected",
"version": "9.18.2"
},
{
"status": "affected",
"version": "9.18.2.5"
},
{
"status": "affected",
"version": "9.18.2.7"
},
{
"status": "affected",
"version": "9.18.2.8"
},
{
"status": "affected",
"version": "9.18.3"
},
{
"status": "affected",
"version": "9.18.3.39"
},
{
"status": "affected",
"version": "9.18.3.46"
},
{
"status": "affected",
"version": "9.18.3.53"
},
{
"status": "affected",
"version": "9.18.3.55"
},
{
"status": "affected",
"version": "9.18.3.56"
},
{
"status": "affected",
"version": "9.18.4"
},
{
"status": "affected",
"version": "9.18.4.5"
},
{
"status": "affected",
"version": "9.18.4.8"
},
{
"status": "affected",
"version": "9.18.4.22"
},
{
"status": "affected",
"version": "9.18.4.24"
},
{
"status": "affected",
"version": "9.18.4.29"
},
{
"status": "affected",
"version": "9.18.4.34"
},
{
"status": "affected",
"version": "9.18.4.40"
},
{
"status": "affected",
"version": "9.18.4.47"
},
{
"status": "affected",
"version": "9.18.4.50"
},
{
"status": "affected",
"version": "9.18.4.52"
},
{
"status": "affected",
"version": "9.18.4.53"
},
{
"status": "affected",
"version": "9.18.4.57"
},
{
"status": "affected",
"version": "9.18.4.66"
},
{
"status": "affected",
"version": "9.18.4.67"
},
{
"status": "affected",
"version": "9.18.4.68"
},
{
"status": "affected",
"version": "9.19.1"
},
{
"status": "affected",
"version": "9.19.1.5"
},
{
"status": "affected",
"version": "9.19.1.9"
},
{
"status": "affected",
"version": "9.19.1.12"
},
{
"status": "affected",
"version": "9.19.1.18"
},
{
"status": "affected",
"version": "9.19.1.22"
},
{
"status": "affected",
"version": "9.19.1.24"
},
{
"status": "affected",
"version": "9.19.1.27"
},
{
"status": "affected",
"version": "9.19.1.28"
},
{
"status": "affected",
"version": "9.19.1.31"
},
{
"status": "affected",
"version": "9.19.1.37"
},
{
"status": "affected",
"version": "9.19.1.38"
},
{
"status": "affected",
"version": "9.19.1.42"
},
{
"status": "affected",
"version": "9.20.1"
},
{
"status": "affected",
"version": "9.20.1.5"
},
{
"status": "affected",
"version": "9.20.2"
},
{
"status": "affected",
"version": "9.20.2.10"
},
{
"status": "affected",
"version": "9.20.2.21"
},
{
"status": "affected",
"version": "9.20.2.22"
},
{
"status": "affected",
"version": "9.20.3"
},
{
"status": "affected",
"version": "9.20.3.4"
},
{
"status": "affected",
"version": "9.20.3.7"
},
{
"status": "affected",
"version": "9.20.3.9"
},
{
"status": "affected",
"version": "9.20.3.10"
},
{
"status": "affected",
"version": "9.20.3.13"
},
{
"status": "affected",
"version": "9.20.3.16"
},
{
"status": "affected",
"version": "9.20.3.20"
},
{
"status": "affected",
"version": "9.20.4"
},
{
"status": "affected",
"version": "9.20.4.7"
},
{
"status": "affected",
"version": "9.20.4.10"
},
{
"status": "affected",
"version": "9.20.4.14"
},
{
"status": "affected",
"version": "9.22.1.1"
},
{
"status": "affected",
"version": "9.22.1.3"
},
{
"status": "affected",
"version": "9.22.1.2"
},
{
"status": "affected",
"version": "9.22.1.6"
},
{
"status": "affected",
"version": "9.22.2"
},
{
"status": "affected",
"version": "9.22.2.4"
},
{
"status": "affected",
"version": "9.22.2.9"
},
{
"status": "affected",
"version": "9.22.2.13"
},
{
"status": "affected",
"version": "9.22.2.14"
},
{
"status": "affected",
"version": "9.23.1"
},
{
"status": "affected",
"version": "9.23.1.3"
},
{
"status": "affected",
"version": "9.23.1.7"
},
{
"status": "affected",
"version": "9.23.1.13"
},
{
"status": "affected",
"version": "9.23.1.19"
},
{
"status": "affected",
"version": "9.23.1.22"
}
]
},
{
"product": "Cisco Secure Firewall Threat Defense (FTD) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.4.0"
},
{
"status": "affected",
"version": "6.4.0.1"
},
{
"status": "affected",
"version": "6.4.0.3"
},
{
"status": "affected",
"version": "6.4.0.2"
},
{
"status": "affected",
"version": "6.4.0.4"
},
{
"status": "affected",
"version": "6.4.0.5"
},
{
"status": "affected",
"version": "6.4.0.6"
},
{
"status": "affected",
"version": "6.4.0.7"
},
{
"status": "affected",
"version": "6.4.0.8"
},
{
"status": "affected",
"version": "6.4.0.9"
},
{
"status": "affected",
"version": "6.4.0.10"
},
{
"status": "affected",
"version": "6.4.0.11"
},
{
"status": "affected",
"version": "6.4.0.12"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.0.8"
},
{
"status": "affected",
"version": "7.0.8.1"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.2.10"
},
{
"status": "affected",
"version": "7.2.10.2"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.4.2.3"
},
{
"status": "affected",
"version": "7.4.2.4"
},
{
"status": "affected",
"version": "7.4.3"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.6.2.1"
},
{
"status": "affected",
"version": "7.7.0"
},
{
"status": "affected",
"version": "7.7.10"
},
{
"status": "affected",
"version": "7.7.10.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "LOW",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-401",
"description": "Missing Release of Memory after Effective Lifetime",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T18:35:06.717Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW"
}
],
"source": {
"advisory": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"defects": [
"CSCwn69079"
],
"discovery": "INTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20021",
"datePublished": "2026-03-04T18:35:06.717Z",
"dateReserved": "2025-10-08T11:59:15.352Z",
"dateUpdated": "2026-03-04T21:30:11.471Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…