CVE-2022-43947: Fortinet FortiOS

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiOS version 7.2.0 through 7.2.3 and before 7.0.10, FortiProxy version 7.2.0 through 7.2.2 and before 7.0.8 administrative interface allows an attacker with a valid user account to perform brute-force attacks on other user accounts via injecting valid login sessions.

Affected products

• Fortinet FortiOS: from 6.2.0, before 6.4.13 (fixed in 6.4.13); from 7.0.0, before 7.0.11 (fixed in 7.0.11); from 7.2.0, before 7.2.4 (fixed in 7.2.4)
• Fortinet FortiProxy: from 1.0.0, up to and including 2.0.9; from 7.0.0, before 7.0.8 (fixed in 7.0.8); from 7.2.0, before 7.2.2 (fixed in 7.2.2)

Published 2023-04-11. Last modified 2026-06-17.