CVE-2025-64157 Code injection in FortiOS

What is CVE-2025-64157?

CVE-2025-64157 is a medium-severity code injection vulnerability in Fortinet Fortios, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.

Weakness: CWE-134

Which versions are affected by CVE-2025-64157?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2025-64157?

No fix has been published for CVE-2025-64157 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2025-64157 being exploited?

There is no known exploitation of CVE-2025-64157 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gq6x-9gv4-v98h.