What’s Vulnerable › Vulnerabilities
CVE-2026-73444: 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
- Severity: medium (CVSS 4.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-15 · updated 2026-09-16
- Weakness: CWE-303
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
- Arista Networks EOS: from 4.36.0 through 4.36.1F; from 4.35.0 through 4.35.5M; from 4.34.0 through 4.34.7M; from 4.33.0 through 4.33.9M; 0
References
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