CVE-2025-64157: Format String Vulnerability in CAPWAP fast-failover mode

Published Feb 10, 2026
·
Updated

A Use of Externally-Controlled Format String vulnerability [CWE-134] in FortiGate may allow an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.

Other sources

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.

— MITRE

Affected Software

6 affected componentsFixes available
Fortinet FortiOS>=7.6.0<=7.6.4
Fortinet FortiOS>=7.4.0<=7.4.9
Fortinet FortiOS>=7.2.0<=7.2.11
Fortinet FortiOS>=7.0
Fortinet FortiOS>=7.0.0<7.4.10
Fortinet FortiOS>=7.6.0<7.6.5

Remediation

Information

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.

Event History

Feb 10, 2026
Advisory Published
via FortiGuard·12:00 AM
Data Sourced
via FortiGuard·12:00 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·03:39 PM
Data Sourced
via MITRE·03:39 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-64157?

CVE-2025-64157 has a critical severity level due to the potential for unauthorized code execution by authenticated administrators.

2

How do I fix CVE-2025-64157?

To fix CVE-2025-64157, upgrade FortiOS to version 7.6.5 or 7.4.10 or later.

3

Which versions of FortiOS are affected by CVE-2025-64157?

CVE-2025-64157 affects FortiOS versions 7.6.0 to 7.6.4, 7.4.0 to 7.4.9, and 7.2.0 to 7.2.11.

4

What type of vulnerability is CVE-2025-64157?

CVE-2025-64157 is classified as a Format String Vulnerability [CWE-134], allowing potential code execution.

5

Who is impacted by CVE-2025-64157?

CVE-2025-64157 impacts administrators of FortiGate devices running vulnerable versions of FortiOS.

Company

Resources

Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
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