Riskcovery

CVE-2026-73451

On affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of secondary switchcard, can

State
Published
Severity
6.3 Medium
Published
Sep 15, 2026
Updated
Sep 15, 2026
Reserved
Aug 12, 2026

Read the record on cve.org

Description

On affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of secondary switchcard, can cause security ACLs on shared SVIs to stop functioning. This may result in incorrect packet permit/deny behavior.

This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Scores

CVSSScoreVectorSource
4.06.3 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NArista
3.14.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NArista

Weaknesses

  • CWE-1419 Incorrect Initialization of Resource

Affected Products

ProductVersions
EOSArista Networks
  • 4.36.0 through 4.36.0.1FAffected
  • 4.35.0 through 4.35.4MAffected
  • 4.34.0 through 4.34.6MAffected
  • 4.33.0 through 4.33.8MAffected
  • 4.32.0 through 4.32.11MAffected
  • 4.31.1F through 4.31.10MAffected

References

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