CVE-2025-20316
Estado: AplazadaMedia (5.3)—
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Puntuación base: 5.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.34%
- Percentil entre todas las CVEs puntuadas: 25
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (3)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-284
Referencias
JSON original (NVD)
Mostrar
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"version": "17.15.2b"
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"published": "2025-09-24T18:15:36.313",
"references": [
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"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD",
"source": "psirt@cisco.com"
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"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."
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"value": "Una vulnerabilidad en la programación de la lista de control de acceso (ACL) de Cisco IOS XE Software para los Switches Cisco Catalyst de las series 9500X y 9600X podría permitir a un atacante remoto no autenticado eludir una ACL configurada en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a la inundación de tráfico desde una dirección MAC no aprendida en una interfaz virtual de switch (SVI) que tiene una ACL de salida aplicada. Un atacante podría explotar esta vulnerabilidad al hacer que la VLAN vacíe su tabla de direcciones MAC. Esta condición también puede ocurrir si la tabla de direcciones MAC está llena. Un exploit exitoso podría permitir al atacante eludir una ACL de salida en un dispositivo afectado."
}
],
"lastModified": "2026-09-26T00:10:00.127",
"sourceIdentifier": "psirt@cisco.com"
}