CVE-2025-20141: Cisco IOS XR Software Release 7.9.2 Denial of Service Vulnerabillity

Published Mar 12, 2025

Updated

A vulnerability in the handling of specific packets that are punted from a line card to a route processor in Cisco IOS XR Software Release 7.9.2 could allow an unauthenticated, adjacent attacker to cause control plane traffic to stop working on multiple Cisco IOS XR platforms.  This vulnerability is due to incorrect handling of packets that are punted to the route processor. An attacker could exploit this vulnerability by sending traffic, which must be handled by the Linux stack on the route processor, to an affected device. A successful exploit could allow the attacker to cause control plane traffic to stop working, resulting in a denial of service (DoS) condition.

Affected Software

48 affected components

Cisco IOS XR Software

All of the following

Cisco IOS XR=7.9.2

Any of the following

Cisco Ncs 540-12z20g-sys-a

Cisco Ncs 540-12z20g-sys-d

Cisco Ncs 540-24q2c2dd-sys

Cisco Ncs 540-24q8l2dd-sys

Cisco Ncs 540-24z8q2c-sys

Cisco Ncs 540-28z4c-sys-a

Cisco Ncs 540-28z4c-sys-d

Cisco Ncs 540-6z14s-sys-d

Cisco Ncs 540-6z18g-sys-a

Cisco Ncs 540-6z18g-sys-d

Cisco Ncs 540-acc-sys

Cisco Ncs 540-fh-agg

Cisco Ncs 540-fh-csr-sys

Cisco Ncs 540x-12z16g-sys-a

Cisco Ncs 540x-12z16g-sys-d

Cisco Ncs 540x-16z4g8q2c-a

Cisco Ncs 540x-16z4g8q2c-d

Cisco Ncs 540x-16z8q2c-d

Cisco Ncs 540x-4z14g2q-a

Cisco Ncs 540x-4z14g2q-d

Cisco Ncs 540x-6z18g-sys-a

Cisco Ncs 540x-6z18g-sys-d

Cisco Ncs 540x-8z16g-sys-a

Cisco Ncs 540x-8z16g-sys-d

Cisco Ncs 540x-acc-sys

Cisco Ncs 5501

Cisco Ncs 5501-se

Cisco Ncs 5502

Cisco Ncs 5502-se

Cisco Ncs 5504

Cisco Ncs 5508

Cisco Ncs 5516

Cisco Ncs 55a1-24h

Cisco Ncs 55a1-24q6h-s

Cisco Ncs 55a1-24q6h-ss

Cisco Ncs 55a1-36h

Cisco Ncs 55a1-36h-se

Cisco Ncs 55a1-48q6h

Cisco Ncs 55a2-mod-hd-s

Cisco Ncs 55a2-mod-s

Cisco Ncs 55a2-mod-se-s

Cisco Ncs 57b1-5dse-sys

Cisco Ncs 57b1-6d24-sys

Cisco Ncs 57c1-48q6-sys

Cisco Ncs 57c3-mod-sys

Cisco Ncs 57d2-18dd-sys

Event History

Mar 12, 2025

CVE Published

via MITRE·04:12 PM

Data Sourced

via MITRE·04:12 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·04:15 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2025-20141?

CVE-2025-20141 is rated as high severity due to the potential for an attacker to disrupt control plane traffic.

How do I fix CVE-2025-20141?

To fix CVE-2025-20141, upgrade to Cisco IOS XR Software Release 7.9.3 or later.

What impact does CVE-2025-20141 have on Cisco IOS XR platforms?

CVE-2025-20141 can cause control plane traffic to stop working, impacting network operations.

Who is affected by CVE-2025-20141?

CVE-2025-20141 affects multiple Cisco IOS XR platforms running vulnerable versions of the software.

Is authentication required to exploit CVE-2025-20141?

No, CVE-2025-20141 can be exploited by an unauthenticated, adjacent attacker.