CVE-2026-73458: CWE-303 Incorrect Implementation of Authentication Algorithm in Arista Networks EOS
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).
CVE-2026-73458: CWE-303 Incorrect Implementation of Authentication Algorithm in Arista Networks EOS
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).
CVSS v3.1
Score 8.2high
Affected software
Arista Networks
EOS
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2026-08-12T16:45:03.510Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa9a0bf55bf5e2cf54b8f23
Added to database: 09/15/2026, 19:47:11 UTC
Last updated: 09/15/2026, 19:47:11 UTC
Views: 1
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