CVE-2026-73458
On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD session(s).
- Published Sep 15, 2026
- CVSS 9.2 critical
- 0.4% chance of exploitation in the next 30 days (EPSS)