Description
On affected platforms running Arista EOS with Open Shortest Path First version 2 (OSPFv2) configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption can affect routing across the broader OSPF domain.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Arista Networks | EOS | 4.36.0F – ≤ 4.36.1F, 4.35.0F – ≤ 4.35.5M, 4.34.0F – ≤ 4.34.7M, 4.33.0F – ≤ 4.33.9M, 1.0.0 – < 4.33.0F | 4.33.0F |
Advisories 1
- WID-SEC-2026-3441 Arista EOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 16, 2026
References
- Security Advisory 0171 vendor-advisory