#VU117944 Buffer overflow in libwebsockets - CVE-2025-1866

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU117944

#VU117944 Buffer overflow in libwebsockets - CVE-2025-1866

Published: November 3, 2025


Vulnerability identifier: #VU117944
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-1866
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
libwebsockets
Software vendor:
libwebsockets.org

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in win32port/zlib/inftrees.c. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability requires that the code is built specifically for the Win32 platform with specific compiler options. 


Remediation

Install updates from vendor's website.

External links