CVE-2026-42369
CriticalSummary
GV-VMS V20 is a video monitoring software that allows remote access to manage and monitor cameras. A stack overflow vulnerability has been discovered in the base64 decoding mechanism, which may facilitate an attacker in exploiting this flaw.
Risk Assessment
This vulnerability could lead to remote code execution, posing a serious threat to the security of the monitoring system and the data stored within the application.
Recommendation
It is recommended to update GV-VMS V20 to the latest version and implement additional security measures, such as restricting access to remote management features.
Original NVD description (English source)
GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other security devices. It is a native application accessed locally, but it is also possible to enable remote access via the "WebCam Server" feature. Once enabled, it is possible to access to the management and monitoring feature via a regular Web interface. This webersever is another native application, compiled without ASLR, which makes exploitation much easier and more likely. Most of the features require authentication before being reachable and leverage a standard login page to grant access. However the `gvapi` endpoint uses its own authentication mechanism via an `HTTP Authorization` header. It supports both `Basic` authentication and the `Digest` modes of authentication. #### Stack-overflow via unbound copy of base64 decoded string The `b64decoder` string is sized dynamically, but it is then copied to the `Buffer` stack variable one character at the time at [0],