CVE-2021-28507: Arista Eos

High severity, CVSS 7.1. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.

Affected products

• Arista Eos: from 4.23.0, up to and including 4.23.9m; from 4.24.0, up to and including 4.24.7m; from 4.25.0, up to and including 4.25.3; from 4.25.4, up to and including 4.25.4m; from 4.25.5, up to and including 4.25.5.1m; from 4.26.0, up to and including 4.26.2f; …

Published 2022-01-14. Last modified 2026-06-17.