CVE-2021-28497: Arista Metamako Operating System

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

In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, the bash shell might be accessible to unprivileged users in situations where they should not have access. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train

Affected products

• Arista Metamako Operating System: up to and including 0.26.6; from 0.31.0, before 0.32.0 (fixed in 0.32.0)

Published 2021-09-09. Last modified 2026-06-17.