Vulnerability · Published May 4, 2026 · Assigned by GV
CVE-2026-7372GeoVision GV-VMS V20 WebCam Server Login stack overflow vulnerability
Critical 9.0
In plain English
A critical-severity out-of-bounds write in GV-VMS V20.0.2 from GeoVision Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
A stack overflow vulnerability exists in the WebCam Server Login functionality of GeoVision GV-VMS V20 20.0.2. A specially crafted HTTP request can lead to an arbitrary code execution. An attacker can make an unauthenticated HTTP request to trigger this vulnerability. #### Stack-overflow via unconstrained sscanf The call to `sscanf` at [1] to split the `Buffer` variable into the `username` and `password` variables doesn't limit the size of the extracted content to match the destination buffers' sizes. In this case, if either the username or password decoded from the authorization string exceeds `40` characters (the size the stack variables `username` and `password`) then a stack overflow will occur. The data is controlled by an attacker, but sronger constraints (e.g. no null bytes) may make exploitation harder. A successful attack could lead to full code execution as SYSTEM on the machine running the service.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GeoVision Inc. | GV-VMS V20.0.2 | 20.0.2 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://www.geovision.com.tw/cyber_security.php vendor-advisory
- https://talosintelligence.com/vulnerability_reports/ third-party-advisory