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 rou

​CVE ID :CVE-2026-73458

Published : Sept. 15, 2026, 7:30 p.m. | 37 minutes ago

Description :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).

Severity: 9.2 | CRITICAL

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