Critical Cisco Nexus 9000 Flaw Lets Unauthenticated Remote Attackers Run Code as Root

Cisco has released patches to address a critical security flaw affecting 10 Silicon One-based Nexus 9000 switches that could allow an unauthenticated, remote attacker to execute code as root, alongside an IOS XR hardening release bundling 7 umbrella CVEs, 2 of which are rated 9.8, with no...

EUVD-2026-70201

A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with root privileges. This vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 L3 virtual routing and...

CVE-2026-20212

CVE-2026-20212 affects the Silicon One Hardware Abstraction Layer (S1HAL) in Cisco Nexus 9000 Series Switches . The root cause is that TCP ports 43210 and 43211 are accessible in the default Layer 3 VRF, allowing an unauthenticated, remote attacker to send crafted input that executes code with ro...

PT-2026-84805

Name of the Vulnerable Software and Affected Versions Cisco Nexus 9000 Series Switches affected versions not specified Description A flaw in the Silicon One integration for specific Cisco Nexus 9000 Series Switches allows an unauthenticated remote attacker to execute code with root privileges. Th...