CVE-2023-26204: Fortinet Fortisiem

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A plaintext storage of a password vulnerability [CWE-256] in FortiSIEM 6.7 all versions, 6.6 all versions, 6.5 all versions, 6.4 all versions, 6.3 all versions, 6.2 all versions, 6.1 all versions, 5.4 all versions, 5.3 all versions may allow an attacker able to access user DB content to impersonate any admin user on the device GUI.

Affected products

• Fortinet Fortisiem: from 5.3.0, up to and including 5.3.3; from 6.3.0, up to and including 6.3.3; from 6.6.0, up to and including 6.6.3; from 6.7.0, up to and including 6.7.5; version 5.4.0 only; version 6.1.0 only; …

Published 2023-06-13. Last modified 2026-06-17.