CVE-2026-25815: Fortinet FortiOS

Low severity, CVSS 3.2. EPSS: 0.1% chance of exploitation in the next 30 days.

Fortinet FortiOS through 7.6.6 allows attackers to decrypt LDAP credentials stored in device configuration files, as exploited in the wild from 2025-12-16 through 2026 (by default, the encryption key is the same across all customers' installations). NOTE: the Supplier's position is that the instance of CWE-1394 is not a vulnerability because customers "are supposed to enable" a non-default option that eliminates the weakness. However, that non-default option can disrupt functionality as shown in the "Managing FortiGates with private data encryption" document, and is therefore intentionally not a default option.

Affected products

• Fortinet FortiOS: up to and including 7.6.6

Published 2026-02-05. Last modified 2026-06-17.