GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
Summary
Out-of-bounds write reported (CVE-2026-42369). Successful exploitation can lead to full system takeover. Exploitable via gvapi.
Original description
The description as published by the 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], and there's no bound-check. As such, if the decoded string is bigger than 256 characters (the size of the Buffer variable) then a stack overflow occurs. Because the data can be fully controlled by an attacker and lack of ASLR, this vulnerability can easily be exploited to gain full code execution as SYSTEM on the machine running the service.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-42369 has been found.
Attackers can target a specific entry point like gvapi over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 10.0/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-42369" on the vendor's site.
CVE-2026-42369 — CWE-787 / CVSS v3 10.0
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: gvapi / Basic / Digest / b64decoder
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds write (CWE-787) has been reported. Attackers reach the vulnerable code path via gvapi without authentication.
Check the vendor advisory for the affected versions. Attack surface: gvapi / Basic / Digest / b64decoder.
Severity: Critical (CVSS 10.0/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで影響コンポーネントを特定する。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web https
- web geovision.com.tw