CVE-2026-59839: Fortinet FortiOS

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiPAM 1.8.0, FortiPAM 1.7.0 through 1.7.2, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

Affected products

• Fortinet FortiOS: from 6.4.0, before 7.4.10 (fixed in 7.4.10); from 7.6.0, before 7.6.7 (fixed in 7.6.7)
• Fortinet Fortipam: from 1.0.0, before 1.7.3 (fixed in 1.7.3); version 1.8.0 only
• Fortinet FortiProxy: from 7.0.0, before 7.4.14 (fixed in 7.4.14); from 7.6.0, before 7.6.6 (fixed in 7.6.6)

Published 2026-07-14. Last modified 2026-08-11.