MEDIUM 5.3 NVD

CVE-2026-73443

On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on whi

On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indefinitely. Replayed advertisements can be used to advertise stale VRRP state, for example to prevent a backup router from taking over the virtual gateway after the original master has gone down, resulting in a denial of service for hosts using the virtual gateway address.

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24713-security-advi

Published: 2026-09-16 · Source: NVD · Feed updated: 2026-09-16

This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-09-16 via NVD.

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