CVE-2025-20141

Cisco IOS XR Software Release 7.9.2 Denial of Service Vulnerabillity

HIGH

7.4

CVSS Score

Published: March 12, 2025 at 04:12 PM UTC

Updated: June 17, 2026 at 08:40 AM UTC

47 products affected across 1 vendorIOS XrNcs 5508Ncs 5501

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Severity

HIGH7.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xr · Cisco

95%

7.9.2

cisco-ncs-540-12z20g-sys-a (environment) · cisco-ncs-540-12z20g-sys-d (environment) · cisco-ncs-540-24q2c2dd-sys (environment) · cisco-ncs-540-24q8l2dd-sys (environment) · cisco-ncs-540-24z8q2c-sys (environment) · cisco-ncs-540-28z4c-sys-a (environment) · cisco-ncs-540-28z4c-sys-d (environment) · cisco-ncs-540-6z14s-sys-d (environment) · cisco-ncs-540-6z18g-sys-a (environment) · cisco-ncs-540-6z18g-sys-d (environment) · cisco-ncs-540-acc-sys (environment) · cisco-ncs-540-fh-agg (environment) · cisco-ncs-540-fh-csr-sys (environment) · cisco-ncs-540x-12z16g-sys-a (environment) · cisco-ncs-540x-12z16g-sys-d (environment) · cisco-ncs-540x-16z4g8q2c-a (environment) · cisco-ncs-540x-16z4g8q2c-d (environment) · cisco-ncs-540x-16z8q2c-d (environment) · cisco-ncs-540x-4z14g2q-a (environment) · cisco-ncs-540x-4z14g2q-d (environment) · cisco-ncs-540x-6z18g-sys-a (environment) · cisco-ncs-540x-6z18g-sys-d (environment) · cisco-ncs-540x-8z16g-sys-a (environment) · cisco-ncs-540x-8z16g-sys-d (environment) · cisco-ncs-540x-acc-sys (environment) · cisco-ncs-5501 (environment) · cisco-ncs-5501-se (environment) · cisco-ncs-5502 (environment) · cisco-ncs-5502-se (environment) · cisco-ncs-5504 (environment) · cisco-ncs-5508 (environment) · cisco-ncs-5516 (environment) · cisco-ncs-55a1-24h (environment) · cisco-ncs-55a1-24q6h-s (environment) · cisco-ncs-55a1-24q6h-ss (environment) · cisco-ncs-55a1-36h (environment) · cisco-ncs-55a1-36h-se (environment) · cisco-ncs-55a1-48q6h (environment) · cisco-ncs-55a2-mod-hd-s (environment) · cisco-ncs-55a2-mod-s (environment) · cisco-ncs-55a2-mod-se-s (environment) · cisco-ncs-57b1-5dse-sys (environment) · cisco-ncs-57b1-6d24-sys (environment) · cisco-ncs-57c1-48q6-sys (environment) · cisco-ncs-57c3-mod-sys (environment) · cisco-ncs-57d2-18dd-sys (environment)

Ncs 540-12Z20G-Sys-A · Ciscodevice

80%

All versions

Ncs 540-12Z20G-Sys-D · Ciscodevice

80%

All versions

Ncs 540-24Q2C2Dd-Sys · Ciscodevice

80%

All versions

Ncs 540-24Q8L2Dd-Sys · Ciscodevice

80%

All versions