CVE-2026-26035: Fortinet FortiWeb

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password

Affected products

• Fortinet FortiWeb: from 7.2.0, before 7.2.13 (fixed in 7.2.13); from 7.4.0, before 7.4.12 (fixed in 7.4.12); from 7.6.0, before 7.6.7 (fixed in 7.6.7); from 8.0.0, before 8.0.3 (fixed in 8.0.3)

Published 2026-08-12. Last modified 2026-09-08.