CVE-2026-77191
Low
Description
An authenticated supplicant on an adjacent network may bypass intended network authorization policy and send unrestricted traffic during a brief window (milliseconds to seconds) between the completion of the authentication phase and the full enforcement of its assigned ACL.
SeverityLow
CVSS2.6
Exploit probability—
ProductEOS
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-862Missing authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Arista Networks EOS | 4.35.0 ≤ v ≤ 4.35.0.3F, 4.34.0 ≤ v ≤ 4.34.5M, v ≤ 4.33.7.1M | — |
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