Cisco patches five critical NX-OS flaws that hand root on Nexus 3000 and 9000 switches

On October 7, 2026, Cisco shipped five critical fixes for NX-OS, the operating system of its Nexus 3000 and 9000 switches: a forged request can run code with root privileges, or crash a process and force a reload. Check whether NX-API, NGOAM or MPLS OAM is enabled on your gear, then patch or disable those features.