CVE-2020-11622: Arista Cloudeos

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A vulnerability exists in Arista’s Cloud EOS VM / vEOS 4.23.2M and below releases in the 4.23.x train, 4.22.4M and below releases in the 4.22.x train, 4.21.3M to 4.21.9M releases in the 4.21.x train, 4.21.3FX-7368.*, 4.21.4-FCRFX.*, 4.21.4.1, 4.21.7.1, 4.22.2.0.1, 4.22.2.2.1, 4.22.3.1, and 4.23.2.1 Router code in a scenario where TCP MSS options are configured.

Affected products

• Arista Cloudeos: from 4.21.3m, up to and including 4.21.9m; from 4.22.0, up to and including 4.22.4m; from 4.23.0, up to and including 4.23.2m; version 4.21.3fx-7368 only; version 4.21.4-fcrfx only; version 4.21.4.1 only; …
• Arista Veos: from 4.21.3m, up to and including 4.21.9m; from 4.22.0, up to and including 4.22.4m; from 4.23.0, up to and including 4.23.2m; version 4.21.3fx-7368 only; version 4.21.4-fcrfx only; version 4.21.4.1 only; …

Published 2020-06-10. Last modified 2026-06-17.