CVE-2025-25252: Fortinet FortiOS

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An Insufficient Session Expiration vulnerability [CWE-613] in FortiOS SSL VPN 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.0 through 7.0.16, 6.4 all versions may allow a remote attacker (e.g. a former admin whose account was removed and whose session was terminated) in possession of the SAML record of a user session to access or re-open that session via re-use of SAML record.

Affected products

• Fortinet FortiOS: from 6.4.0, before 7.0.17 (fixed in 7.0.17); from 7.2.0, before 7.2.11 (fixed in 7.2.11); from 7.4.0, before 7.4.7 (fixed in 7.4.7); from 7.6.0, before 7.6.3 (fixed in 7.6.3)

Published 2025-10-14. Last modified 2026-10-08.