Cisco IOS XR vulnerable to critical denial of service

A vulnerability in Cisco IOS XR network operating system allows an attacker to cause a fatal error affecting the egress packet network interface.

Published 15sem1 sourceImportantupdated 6sem

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The fact

This critical flaw compromises the stability and availability of Cisco equipment deployed in enterprise network infrastructure.

A security patch has been developed and must be installed on all affected routers and switches.

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Auto-synthesis from 1 media source · identified on May 11, 2026