CVE-2021-22130: Fortinet FortiProxy

Medium severity, CVSS 4.9. EPSS: 1.1% chance of exploitation in the next 30 days.

A stack-based buffer overflow vulnerability in FortiProxy physical appliance CLI 2.0.0 to 2.0.1, 1.2.0 to 1.2.9, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 may allow an authenticated, remote attacker to perform a Denial of Service attack by running the `diagnose sys cpuset` with a large cpuset mask value. Fortinet is not aware of any successful exploitation of this vulnerability that would lead to code execution.

Affected products

• Fortinet FortiProxy: from 1.0.0, up to and including 1.0.7; from 1.1.0, up to and including 1.1.6; from 1.2.0, before 1.2.10 (fixed in 1.2.10); from 2.0.0, before 2.0.2 (fixed in 2.0.2)

Published 2021-06-03. Last modified 2026-06-17.