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OpenAdvisories
Medium · 4.7 CVE-2026-73444 EUVD-2026-80009GHSA-c355-4cc9-9547

On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the

Published Sep 15, 2026 · Updated Sep 16, 2026 · Assigned by Arista

Description

On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the virtual router master role, enabling the attacker to intercept, modify, or discard traffic that hosts on the segment send to the virtual gateway address.

Affected products

VendorProductAffectedFixed
Arista Networks EOS 4.36.0 – ≤ 4.36.1F, 4.35.0 – ≤ 4.35.5M, 4.34.0 – ≤ 4.34.7M, 4.33.0 – ≤ 4.33.9M —

Advisories 1

References