CVE-2026-20021 (GCVE-0-2026-20021)

Vulnerability from cvelistv5 – Published: 2026-03-04 18:35 – Updated: 2026-03-04 21:30
VLAI
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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
Impacted products
Vendor Product Version
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
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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
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Show details on NVD website

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              "version": "9.16.3.19"
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              "status": "affected",
              "version": "9.16.3.23"
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              "status": "affected",
              "version": "9.16.4"
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              "status": "affected",
              "version": "9.16.4.9"
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            {
              "status": "affected",
              "version": "9.16.4.14"
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            {
              "status": "affected",
              "version": "9.16.4.19"
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            {
              "status": "affected",
              "version": "9.16.4.27"
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              "status": "affected",
              "version": "9.16.4.38"
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            {
              "status": "affected",
              "version": "9.16.4.39"
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              "status": "affected",
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              "status": "affected",
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              "version": "9.17.1.13"
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              "status": "affected",
              "version": "9.17.1.15"
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              "status": "affected",
              "version": "9.17.1.20"
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              "status": "affected",
              "version": "9.17.1.30"
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              "status": "affected",
              "version": "9.17.1.33"
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              "status": "affected",
              "version": "9.17.1.39"
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              "status": "affected",
              "version": "9.17.1.45"
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              "status": "affected",
              "version": "9.17.1.46"
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              "version": "9.18.1.3"
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              "status": "affected",
              "version": "9.19.1.12"
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              "status": "affected",
              "version": "9.19.1.18"
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              "status": "affected",
              "version": "9.19.1.22"
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              "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"
            },
            {
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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            }
          ]
        },
        {
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "6.4.0"
            },
            {
              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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            },
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              "status": "affected",
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              "status": "affected",
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            },
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              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "7.0.0"
            },
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
              "version": "7.2.5"
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
              "version": "7.2.5.2"
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              "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"
            },
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              "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": "2026-08-11",
      "epss": "0.00213",
      "percentile": "0.11692"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-20021\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2026-03-04T19:16:12.150\",\"lastModified\":\"2026-08-11T19:40:47.230\",\"vulnStatus\":\"Analyzed\",\"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.\"}],\"affected\":[{\"source\":\"psirt@cisco.com\",\"affectedData\":[{\"vendor\":\"Cisco\",\"product\":\"Cisco Secure Firewall Adaptive Security Appliance (ASA) 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    "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\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20021\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-04T21:29:56.096429Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-04T21:30:06.900Z\"}}], \"cna\": {\"source\": {\"defects\": [\"CSCwn69079\"], \"advisory\": \"cisco-sa-asaftd-ospf-ZH8PhbSW\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.3, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software\", \"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\"}]}, {\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Firewall Threat Defense (FTD) Software\", \"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\"}]}], \"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.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW\", \"name\": \"cisco-sa-asaftd-ospf-ZH8PhbSW\"}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-401\", \"description\": \"Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-04T18:35:06.717Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20021\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T21:30:11.471Z\", \"dateReserved\": \"2025-10-08T11:59:15.352Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-03-04T18:35:06.717Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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