CVE-2026-121368
HIGH
NVD
CVSS Score
8.6
Severity
HIGH
Published
Nov 10, 2026
Vendor
unknown
Description
On affected platforms running Arista EOS with Bidirectional Forwarding Detection (BFD) configured to use keyed MD5 or keyed SHA1 authentication, an unauthenticated attacker with network adjacency (direct or multi-hop) to a BFD-enabled interface can send a specially crafted BFD packet resulting in a system reboot.