CVE-2023-24509: Arista Eos

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

On affected modular platforms running Arista EOS equipped with both redundant supervisor modules and having the redundancy protocol configured with RPR or SSO, an existing unprivileged user can login to the standby supervisor as a root user, leading to a privilege escalation. Valid user credentials are required in order to exploit this vulnerability.

Affected products

• Arista Eos: from 4.23, up to and including 4.23.13m; from 4.24.0, before 4.24.11m (fixed in 4.24.11m); from 4.25.0, before 4.25.10m (fixed in 4.25.10m); from 4.26.0, before 4.26.9m (fixed in 4.26.9m); from 4.27.0, before 4.27.7m (fixed in 4.27.7m); from 4.28.0, before 4.28.4m (fixed in 4.28.4m)

Published 2023-04-13. Last modified 2026-06-17.