CVE-2026-73444On 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
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It affects Arista Networks EOS. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- Weakness (CWE)
- CWE-303
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Arista
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Arista Networks EOS arista_networks:eos (from the name) | from 4.36.0 through 4.36.1F; fixed at 4.36.2F; from 4.35.0 through 4.35.5M; fixed at 4.35.6M; from 4.34.0 through 4.34.7M; fixed at 4.34.8M; from 4.33.0 through 4.33.9M; fixed at 4.33.10M; 0 | CNA record |
References
- https://www.arista.com/en/support/advisories-notices/security-advisory/24713-security-advisory-0157vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.