CVE-2025-64157

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 authen

Severity
Medium 6.7
CVSS 3.1
Exploited
Not listed
EPSS
0.014
71.7th percentile
Discovered by
Vendor
Vendor advisory field
Published
Feb 10, 2026
Assigned by fortinet

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

Affected products

Vendor Product Category Matched by
Fortinet FortiOS Firewall / NGFW cna-assigner
Vendor-reported products (2)
  • Fortinet · FortiOS
  • Siemens · RUGGEDCOM APE1808

Credit

Internally discovered and reported by Yonghui Han of Fortinet Product Security team.

Vendor remediation

Upgrade to FortiOS version 7.6.5 or above Upgrade to FortiOS version 7.4.10 or above Upgrade to FortiProxy version 7.6.5 or above Upgrade to FortiPAM version 1.7.2 or above Upgrade to FortiSwitchManager version 7.2.8 or above Fortinet remediated this issue in FortiSASE version 25.4.c (not released) and hence customers do not need to perform any action.

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