Quick answers
- Is CVE-2026-42370 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42370 being exploited in the wild.
- How severe is CVE-2026-42370?
- Critical severity, with a CVSS score of 9, published 4 May 2026.
- Which products and versions are affected?
- Geovision GV-VMS 20.0.2.
- Is there a fix for CVE-2026-42370?
- A patch was published on 2026-04-27: Vendor advisory indicates completion of security updates Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-42370 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-42370?
- Check whether you run Geovision GV-VMS or Geovision Gv-Vms Firmware at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow (CWE-787) exists in the WebCam Server component of GeoVision GV-VMS V20 version 20.0.2. The vulnerability is located within the login logging routine, where the application uses 'strcpy' to copy a user-provided 'id' (username) field from an HTTP request into a fixed-size stack buffer without length validation. An unauthenticated remote attacker can exploit this by sending a specially crafted HTTP request with an oversized username string to overwrite the return address and achieve arbitrary code execution. The risk is heightened because the affected binary was reportedly compiled without Address Space Layout Randomization (ASLR). GeoVision has addressed this in version 21.0.0.
Affected products
- GeoVision GV-VMS V20 20.0.2
Timeline
- 2026-05-04: advisory: Initial NVD publication
- 2026-06-15: disclosed: Detailed Talos advisory released
- 2026-04-27: patched: Vendor advisory indicates completion of security updates