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
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1419 |
| Vendor | arista networks |
| Product | eos |
| Published | Sep 15, 2026 |
| Last Updated | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Arista Networks / EOS
4.36.0 ≤ 4.36.0.1F 4.35.0 ≤ 4.35.4M 4.34.0 ≤ 4.34.6M 4.33.0 ≤ 4.33.8M 4.32.0 ≤ 4.32.11M 4.31.1F ≤ 4.31.10M