Stack-based buffer overflow in CivetWeb - CVE-2025-55763
Published: September 3, 2025 / Updated: November 24, 2025
Vulnerability identifier: #VU114768
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:P/U:Amber
CVE-ID: CVE-2025-55763
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: civetweb
Affected software:
CivetWeb
CivetWeb
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when handling HTTP requests. A remote unauthenticated attacker can send a specially crafted HTTP request, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2025-55763
Install update from vendor's website.