Advisoriesby IbisArista NetworksCVE-2026-77191
Arista Networks EOS: missing authorization
No fix yet
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| EOS Product | >= 4.35.0, <= 4.35.0.3F | No fix yet |
| >= 4.34.0, <= 4.34.5M | No fix yet | |
| >= 0.0.0, <= 4.33.7.1M | No fix yet |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-862