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CVE-2025-20144

MEDIUMCVSS 5.8/10EPSS 0.32%

Last modified

CVE-2025-20144 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
5.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS Probability
0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xr6.5.1
CiscoIos Xr6.5.2
CiscoIos Xr6.5.3
CiscoIos Xr6.5.92
CiscoIos Xr6.5.93
CiscoIos Xr6.6.1
CiscoIos Xr6.6.2
CiscoIos Xr6.6.3
CiscoIos Xr6.6.4
CiscoIos Xr6.6.25
CiscoIos Xr7.0.1
CiscoIos Xr7.0.2
CiscoIos Xr7.0.90
CiscoIos Xr7.1.1
CiscoIos Xr7.1.2
CiscoIos Xr7.2.1
CiscoIos Xr7.2.2
CiscoIos Xr7.3.1
CiscoIos Xr7.3.2
CiscoIos Xr7.3.3
CiscoIos Xr7.3.4
CiscoIos Xr7.3.5
CiscoIos Xr7.3.6
CiscoIos Xr7.4.1
CiscoIos Xr7.4.2
CiscoIos Xr7.5.1
CiscoIos Xr7.5.2
CiscoIos Xr7.5.3
CiscoIos Xr7.5.4
CiscoIos Xr7.5.5
CiscoIos Xr7.6.1
CiscoIos Xr7.6.2
CiscoIos Xr7.7.1
CiscoIos Xr7.7.2
CiscoIos Xr7.7.21
CiscoIos Xr7.8.1
CiscoIos Xr7.8.2
CiscoIos Xr7.8.22
CiscoIos Xr7.9.1
CiscoIos Xr7.9.2
CiscoIos Xr7.10.1
CiscoIos Xr7.10.2
CiscoIos Xr7.11.1

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2025-20144?
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.
How severe is CVE-2025-20144?
CVE-2025-20144 has a CVSS score of 5.8/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.
How do I fix CVE-2025-20144?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-20144?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST