CVE-2026-20051

A vulnerability with the Ethernet VPN EVPN Layer 2 ingress packet processing of Cisco Nexus 3600 Platform Switches and Cisco Nexus 9500-R Series Switching Platforms could allow an unauthenticated, adjacent attacker to trigger a Layer 2 traffic loop. This vulnerability is due to a logic error when...

CVE-2026-20051

Summary: CVE-2026-20051 affects Cisco Nexus 3600 Series switches and Nexus 9500-R Series platforms, where a logic error in Ethernet VPN (EVPN) Layer 2 ingress packet processing can be triggered by a crafted Layer 2 frame. An unauthenticated, adjacent attacker could induce a Layer 2 traffic loop t...

PT-2026-21939

Name of the Vulnerable Software and Affected Versions Cisco Nexus 3600 Platform Switches affected versions not specified Cisco Nexus 9500-R Series Switching Platforms affected versions not specified Description A flaw exists in the Ethernet VPN EVPN Layer 2 ingress packet processing of Cisco Nexu...