Integer overflow in FCGI - CVE-2025-40907
Published: June 10, 2025
Vulnerability identifier: #VU110697
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-40907
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Catalyst
Affected software:
FCGI
FCGI
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to inclusion of code from libfcgi/fcgiapp.c vulnerable to an integer overflow, as described in #VU107896 (CVE-2025-23016). A remote attacker can send a specially crafted request to the application, trigger memory corruption and execute arbitrary code on the system.
How to mitigate CVE-2025-40907
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.