CVE-2026-120983

medium

Description

On affected EOS platforms where 802.1x is configured in multi-host authenticated mode and the device is configured with Policy Based Routing (PBR), traffic from unauthenticated hosts may be forwarded to the destination configured in the PBR policies. This could potentially allow unauthenticated hosts access to networks. Additionally Layer 2 and Layer 3 control packets from unauthenticated hosts may get copied to the CPU.

References

https://www.arista.com/en/support/advisories-notices/security-advisory/25037-security-advisory-0215

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-122806

Details

Source: Mitre, NVD

Published: 2026-11-10

Updated: 2026-11-13

Risk Information

CVSS v2

Base Score: 7.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.6

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Severity: High

CVSS v4

Base Score: 6.1

Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00173