Description
On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay/snooping configured with the information option (Option 82), or with the DHCP server configured with match criteria based on the information option, an unauthenticated attacker connected to a client-facing VLAN(s) where the relay is configured can send a specially crafted packet that causes the DHCP Relay service to restart.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Arista Networks | EOS | 4.35.0 – ≤ 4.35.5M, 4.34.0 – ≤ 4.34.7.1M, 4.33.0 – ≤ 4.33.9M | — |
Advisories 1
- WID-SEC-2026-3287 Arista EOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 16, 2026