CVE-2025-20145

Cisco IOS XR Software Access Control List Bypass Vulnerability

Medium · published March 12, 2025

CVSS v3.1
5.8
EPSS
0%
Percentile
33.8
In the wild
Unconfirmed
What it is

A vulnerability in the access control list (ACL) processing in the egress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL.

This vulnerability exists because certain packets are handled incorrectly when they are received on an ingress interface on one line card and destined out of an egress interface on another line card where the egress ACL is configured. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an egress ACL on the affected device.

For more information about this vulnerability, see the section of this advisory.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00407 · 33.8th percentile
Published
2025-03-12T16:12Z
EPSS history
Timeline
  • 12 MAR 16:12Z
    Cisco IOS XR Software Access Control List Bypass Vulnerability
    cvelistv5