CVE-2026-25815: Low severity Fortinet FortiOS vulnerability
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-25815?
The severity of CVE-2026-25815 is considered critical due to the risk of LDAP credential decryption.
How do I fix CVE-2026-25815?
To fix CVE-2026-25815, upgrade Fortinet FortiOS to a version higher than 7.6.6 to eliminate the vulnerability.
What software is affected by CVE-2026-25815?
CVE-2026-25815 affects Fortinet FortiOS versions up to and including 7.6.6.
What types of credentials are compromised in CVE-2026-25815?
CVE-2026-25815 allows attackers to decrypt LDAP credentials stored in device configuration files.
When was CVE-2026-25815 exploited in the wild?
CVE-2026-25815 was exploited in the wild from December 16, 2025, through 2026.