CVE-2025-20144 Cisco IOS XR Software Access Control List Bypass Vulnerability

Medium 4.0 Published 12 Mar 2025 Updated 21 Mar 2025

Remote attackers can bypass configured access control lists on Cisco IOS XR devices due to incorrect packet handling in specific hybrid ACL configurations.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20144?

CVE-2025-20144 is a medium-severity vulnerability in Cisco Ios Xr, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the hybrid access control list (ACL) processing of IPv4 packets in Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incorrect handling of packets when a specific configuration of the hybrid ACL exists. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass a configured ACL on the affected device. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.

Weakness: CWE-284

Which versions are affected by CVE-2025-20144?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2025-20144?

No fix has been published for CVE-2025-20144 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-20144 being exploited?

There is no known exploitation of CVE-2025-20144 in the wild and no public exploit code.

All Cisco Ios Xr vulnerabilities

Sources

Also known as GHSA-82g5-9hm8-rvm3.