CVE-2026-19655
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.
- Published Sep 15, 2026
- CVSS 7.1 high
- 0.2% chance of exploitation in the next 30 days (EPSS)