FortiOS 7.4.8-7.6.3 API Null Pointer Deref in httpd via Unchecked Return
CVE-2025-58903 Published on October 14, 2025
An Unchecked Return Value vulnerability [CWE-252] in Fortinet FortiOS version 7.6.0 through 7.6.3 and before 7.4.8 API allows an authenticated user to cause a Null Pointer Dereference, crashing the http daemon via a specialy crafted request.
Vulnerability Analysis
CVE-2025-58903 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
Unchecked Return Value
The software does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. Two common programmer assumptions are "this function call can never fail" and "it doesn't matter if this function call fails". If an attacker can force the function to fail or otherwise return a value that is not expected, then the subsequent program logic could lead to a vulnerability, because the software is not in a state that the programmer assumes. For example, if the program calls a function to drop privileges but does not check the return code to ensure that privileges were successfully dropped, then the program will continue to operate with the higher privileges.
Products Associated with CVE-2025-58903
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Affected Versions
Fortinet FortiOS:- Version 7.6.0, <= 7.6.3 is affected.
- Version 7.4.0, <= 7.4.8 is affected.
- Version 7.2.0, <= 7.2.12 is affected.
- Version 7.0.0, <= 7.0.18 is affected.
- Version 6.4.0, <= 6.4.16 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.