EUVD-2026-41235
GHSA-qq94-fr6f-gvjv
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Browser-mediated reach gives AV:N and UI:R; unauthenticated WebSocket is PR:N; overflow reliability plus cross-origin constraints justify AC:H; crossing browser-to-local-service authority is S:C with full memory-corruption C/I/A:H.
Primary rating from Vendor (GV).
CVSS VectorVendor: GV
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
GeoWebPlayer (also called "Web Plugin" in the GV-VMS documentation and "WS Player" for VMS-Cloud) is an addon that can be installed with various GeoVision software (GV-VMS, GV-Cloud, ...). It creates a websocket server that expands the capabilities of the various web-interfaces provided by the GeoVision software and may be necessary for them to function properly.
The Websocket server can accept various commands coming from localhost. One of them, connectionInfo is meant to provide the necessary details to connect to a camera. The handler associated with this command that we callhandle_connection_info contains multiple instances of string copy that can overflow. The function handle_connect_info copies attacker-controlled JSON strings into fixed-size buffers using manual byte-by-byte loops that do not enforce length limits.
Buffer Overflow in username field (no key present)
AnalysisAI
Remote code execution in GeoVision GeoWebPlayer (the "Web Plugin"/"WS Player" addon bundled with GV-VMS, GV-Cloud and VMS-Cloud) is possible because the addon's localhost WebSocket server processes a 'connectionInfo' command whose handler copies attacker-supplied JSON strings into fixed-size buffers without bounds checks (CWE-120). Because the WebSocket is reachable via the victim's browser (AV:N), a malicious web page can drive the overflow when a user with the addon installed visits it (UI:R), yielding memory corruption with high confidentiality, integrity and availability impact and a scope change. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the GeoVision GeoWebPlayer addon be installed and actively running its local WebSocket server (installed alongside GV-VMS, GV-Cloud or VMS-Cloud). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 8.3 (High) with vector AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H - network reachable and unauthenticated, but gated by high attack complexity and required user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a malicious web page and lures a user whose workstation runs the GeoWebPlayer addon into visiting it; JavaScript on the page opens a WebSocket to the local GeoWebPlayer server and sends a crafted 'connectionInfo' message with an oversized username field. The unbounded copy in handle_connect_info overflows a fixed-size buffer, corrupting memory and potentially executing attacker-controlled code on the victim host. … |
| Remediation | Consult the GeoVision security advisory at https://www.geovision.com.tw/cyber_security.php and upgrade GeoWebPlayer to the vendor-fixed build once identified - patch available per vendor advisory, but no exact fix version is confirmed in the available data, so verify the fixed version directly with GeoVision before relying on it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all systems running GeoVision with the GeoWebPlayer (WS Player) addon and disable the plugin if not operationally essential; establish browser access policies for staff to limit visits to untrusted websites. …
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Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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