Is CVE-2026-12488 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-12488 being exploited in the wild.

How severe is CVE-2026-12488?

Medium severity, with a CVSS score of 6.2, published 24 June 2026.

Is there a fix for CVE-2026-12488?

A patch was published on 2025-12-02: Vendor released version 20.1.0.0 to address the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-12488 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-12488?

Check whether you run Geovision GV-VMS 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.

CVE-2026-12488: GeoVision GV-VMS stack buffer overflow in GV-Cloud

CVE-2026-12488 · Severity: medium · CVSS 6.2 · Published 2026-06-24

A security vulnerability exists in GeoVision's video management software, which is used to manage and monitor security camera feeds. An attacker could impersonate a legitimate cloud server to send malicious commands to the software, potentially causing the system to crash or stop responding. This could lead to a temporary loss of surveillance capabilities and security monitoring.

Technologies: Geovision GV-VMS. Vendors: Geovision.

Quick answers

Is CVE-2026-12488 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-12488 being exploited in the wild.
How severe is CVE-2026-12488?: Medium severity, with a CVSS score of 6.2, published 24 June 2026.
Which products and versions are affected?: Geovision GV-VMS 20.0.2.
Is there a fix for CVE-2026-12488?: A patch was published on 2025-12-02: Vendor released version 20.1.0.0 to address the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-12488 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-12488?: Check whether you run Geovision GV-VMS 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-121) exists in the GvRelayProxy.dll component of GeoVision GV-VMS V20. The vulnerability is located in the GvRelayProxyServerThreadProc function, which fails to validate the 'size' field in the header of incoming network messages before reading data into a fixed-size stack buffer (4072 bytes). An attacker can exploit this by impersonating the 'relay.vsm.mygvcloud.com' server via DNS poisoning or Man-in-the-Middle (MitM) attacks, as the software fails to properly verify the server's identity during the handshake. Successful exploitation can lead to a denial of service (DoS) via a stack cookie failure or potentially remote code execution (RCE) if the attacker can bypass stack protections. The issue is addressed in version 20.1.0.0.

Affected products

GeoVision GV-VMS V20 20.0.2

Timeline

2025-12-02: patched: Vendor released version 20.1.0.0 to address the issue.
2026-05-10: disclosed: Vulnerability disclosed to the vendor.
2026-06-23: advisory: Cisco Talos published detailed vulnerability report.
2026-06-24: disclosed: CVE-2026-12488 published.

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.