CVE-2026-77191
âšī¸ lowSummary
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.
CVSS Score
2.6
Low
EPSS Score
0.1
Exploit Probability
Published Date
2026-09-14
First Seen: 2026-09-16
đ Relative Risk Intelligence
This CVE is Lower Risk - more severe than 1.5% of all 357,695 vulnerabilities in our database.
#352,457
Below average severity
Severity Percentile
đ¯ CISA SSVC Assessment Updated: Sep 15, 2026
đ Exploitation Status
None
No known exploits
âī¸ Automatable
NO
Requires human interaction
đĨ Technical Impact
Partial
Limited system impact
đ Discovered By
Those issues were discovered internally by Arista, and the company is not aware of any malicious exploitation of these vulnerabilities in customer networks.
SSVC data provided by
CISA
Last Modified
2026-09-15
Source
NVD đ
CVSS Vector 3.1
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Vector 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
CWE IDs (Weakness Types)