CVE-2025-20316 (GCVE-0-2025-20316)
Vulnerability from cvelistv5 – Published: 2025-09-24 17:16 – Updated: 2025-09-24 17:28
VLAI
EPSS
VEX
Summary
A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.
This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-24 17:28 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software |
Affected:
17.7.1
Affected: 17.10.1 Affected: 17.10.1b Affected: 17.8.1 Affected: 17.9.1 Affected: 17.9.2 Affected: 17.9.3 Affected: 17.9.4 Affected: 17.9.5 Affected: 17.9.4a Affected: 17.9.6 Affected: 17.9.6a Affected: 17.9.7 Affected: 17.11.1 Affected: 17.12.1 Affected: 17.12.2 Affected: 17.12.3 Affected: 17.12.4 Affected: 17.12.5 Affected: 17.13.1 Affected: 17.14.1 Affected: 17.15.1 Affected: 17.15.2 Affected: 17.15.3 Affected: 17.15.2b Affected: 17.16.1 Affected: 17.17.1 |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-20316",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-24T17:28:32.049852Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-24T17:28:43.201Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco IOS XE Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "17.7.1"
},
{
"status": "affected",
"version": "17.10.1"
},
{
"status": "affected",
"version": "17.10.1b"
},
{
"status": "affected",
"version": "17.8.1"
},
{
"status": "affected",
"version": "17.9.1"
},
{
"status": "affected",
"version": "17.9.2"
},
{
"status": "affected",
"version": "17.9.3"
},
{
"status": "affected",
"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.5"
},
{
"status": "affected",
"version": "17.9.4a"
},
{
"status": "affected",
"version": "17.9.6"
},
{
"status": "affected",
"version": "17.9.6a"
},
{
"status": "affected",
"version": "17.9.7"
},
{
"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.12.1"
},
{
"status": "affected",
"version": "17.12.2"
},
{
"status": "affected",
"version": "17.12.3"
},
{
"status": "affected",
"version": "17.12.4"
},
{
"status": "affected",
"version": "17.12.5"
},
{
"status": "affected",
"version": "17.13.1"
},
{
"status": "affected",
"version": "17.14.1"
},
{
"status": "affected",
"version": "17.15.1"
},
{
"status": "affected",
"version": "17.15.2"
},
{
"status": "affected",
"version": "17.15.3"
},
{
"status": "affected",
"version": "17.15.2b"
},
{
"status": "affected",
"version": "17.16.1"
},
{
"status": "affected",
"version": "17.17.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.\r\n\r This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Control",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-24T17:16:45.155Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-cat9k-acl-L4K7VXgD",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"
}
],
"source": {
"advisory": "cisco-sa-cat9k-acl-L4K7VXgD",
"defects": [
"CSCwo11541"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2025-20316",
"datePublished": "2025-09-24T17:16:45.155Z",
"dateReserved": "2024-10-10T19:15:13.253Z",
"dateUpdated": "2025-09-24T17:28:43.201Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-20316",
"date": "2026-09-26",
"epss": "0.00336",
"percentile": "0.24417"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Cisco IOS XE Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "17.7.1"
},
{
"status": "affected",
"version": "17.10.1"
},
{
"status": "affected",
"version": "17.10.1b"
},
{
"status": "affected",
"version": "17.8.1"
},
{
"status": "affected",
"version": "17.9.1"
},
{
"status": "affected",
"version": "17.9.2"
},
{
"status": "affected",
"version": "17.9.3"
},
{
"status": "affected",
"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.5"
},
{
"status": "affected",
"version": "17.9.4a"
},
{
"status": "affected",
"version": "17.9.6"
},
{
"status": "affected",
"version": "17.9.6a"
},
{
"status": "affected",
"version": "17.9.7"
},
{
"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.12.1"
},
{
"status": "affected",
"version": "17.12.2"
},
{
"status": "affected",
"version": "17.12.3"
},
{
"status": "affected",
"version": "17.12.4"
},
{
"status": "affected",
"version": "17.12.5"
},
{
"status": "affected",
"version": "17.13.1"
},
{
"status": "affected",
"version": "17.14.1"
},
{
"status": "affected",
"version": "17.15.1"
},
{
"status": "affected",
"version": "17.15.2"
},
{
"status": "affected",
"version": "17.15.3"
},
{
"status": "affected",
"version": "17.15.2b"
},
{
"status": "affected",
"version": "17.16.1"
},
{
"status": "affected",
"version": "17.17.1"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.\r\n\r This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la programaci\u00f3n de la lista de control de acceso (ACL) de Cisco IOS XE Software para los Switches Cisco Catalyst de las series 9500X y 9600X podr\u00eda permitir a un atacante remoto no autenticado eludir una ACL configurada en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a la inundaci\u00f3n de tr\u00e1fico desde una direcci\u00f3n MAC no aprendida en una interfaz virtual de switch (SVI) que tiene una ACL de salida aplicada. Un atacante podr\u00eda explotar esta vulnerabilidad al hacer que la VLAN vac\u00ede su tabla de direcciones MAC. Esta condici\u00f3n tambi\u00e9n puede ocurrir si la tabla de direcciones MAC est\u00e1 llena. Un exploit exitoso podr\u00eda permitir al atacante eludir una ACL de salida en un dispositivo afectado."
}
],
"id": "CVE-2025-20316",
"lastModified": "2026-09-26T00:10:00.127",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "psirt@cisco.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-20316",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-24T17:28:32.049852Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-24T18:15:36.313",
"references": [
{
"source": "psirt@cisco.com",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-284"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-09-25T17:47:04+00:00",
"cve": "CVE-2025-20316",
"id": "CVE-2025-20316",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2025-20316",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-20316.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-20316",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-24T17:28:32.049852Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-24T17:28:36.114Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco IOS XE Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "17.7.1"
},
{
"status": "affected",
"version": "17.10.1"
},
{
"status": "affected",
"version": "17.10.1b"
},
{
"status": "affected",
"version": "17.8.1"
},
{
"status": "affected",
"version": "17.9.1"
},
{
"status": "affected",
"version": "17.9.2"
},
{
"status": "affected",
"version": "17.9.3"
},
{
"status": "affected",
"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.5"
},
{
"status": "affected",
"version": "17.9.4a"
},
{
"status": "affected",
"version": "17.9.6"
},
{
"status": "affected",
"version": "17.9.6a"
},
{
"status": "affected",
"version": "17.9.7"
},
{
"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.12.1"
},
{
"status": "affected",
"version": "17.12.2"
},
{
"status": "affected",
"version": "17.12.3"
},
{
"status": "affected",
"version": "17.12.4"
},
{
"status": "affected",
"version": "17.12.5"
},
{
"status": "affected",
"version": "17.13.1"
},
{
"status": "affected",
"version": "17.14.1"
},
{
"status": "affected",
"version": "17.15.1"
},
{
"status": "affected",
"version": "17.15.2"
},
{
"status": "affected",
"version": "17.15.3"
},
{
"status": "affected",
"version": "17.15.2b"
},
{
"status": "affected",
"version": "17.16.1"
},
{
"status": "affected",
"version": "17.17.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.\r\n\r This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Control",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-24T17:16:45.155Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-cat9k-acl-L4K7VXgD",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"
}
],
"source": {
"advisory": "cisco-sa-cat9k-acl-L4K7VXgD",
"defects": [
"CSCwo11541"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2025-20316",
"datePublished": "2025-09-24T17:16:45.155Z",
"dateReserved": "2024-10-10T19:15:13.253Z",
"dateUpdated": "2025-09-24T17:28:43.201Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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…