CVE-2026-57265 Overview
CVE-2026-57265 affects GeoWebPlayer, an addon distributed with GeoVision software including GV-VMS and GV-Cloud. The component is also referenced as Web Plugin in GV-VMS documentation and WS Player for VMS-Cloud. GeoWebPlayer runs a local WebSocket server that extends the functionality of GeoVision web interfaces.
The server accepts commands from localhost that include an index parameter used to access internal arrays. The index value is not validated against valid bounds, allowing out-of-bounds array access through the audio command and related handlers. This improper validation of array index [CWE-129] can be triggered remotely when a user visits a crafted web page that issues commands to the local WebSocket endpoint.
Critical Impact
Attackers can achieve out-of-bounds memory access in the GeoWebPlayer WebSocket server, leading to compromise of confidentiality, integrity, and availability on affected hosts.
Affected Products
- GeoVision GeoWebPlayer (Web Plugin) for GV-VMS
- GeoVision WS Player for GV-Cloud / VMS-Cloud
- GeoVision software installations that bundle the GeoWebPlayer addon
Discovery Timeline
- 2026-07-02 - CVE-2026-57265 published to NVD
- 2026-07-02 - Last updated in NVD database
Technical Details for CVE-2026-57265
Vulnerability Analysis
GeoWebPlayer installs a local WebSocket server bound to localhost. The server exposes a command interface that browser-based GeoVision interfaces use to control audio, video, and playback features. Many command handlers require an index argument, which the server uses to look up entries in internal arrays before entering critical sections or invoking downstream function pointers.
The audio command handler does not validate that the supplied index falls within the bounds of the target array. An attacker who supplies an arbitrary integer causes the handler to read or write memory outside the intended array. Because the same pattern appears across several commands, the out-of-bounds access primitive is broadly reachable from any origin that can open a WebSocket to the local server.
Root Cause
The root cause is improper validation of an array index [CWE-129] in WebSocket command handlers. Command dispatch code accepts an integer index from the client message and uses it directly for array indexing without range checks. Downstream operations dereference the resulting pointer, enter synchronization primitives, or call functions retrieved from the array entry.
Attack Vector
Exploitation requires user interaction. A victim must load a malicious page in a browser on a host running the vulnerable GeoWebPlayer instance. The page opens a WebSocket connection to the local server and sends crafted command messages carrying an out-of-range index. The scope-changed CVSS vector reflects that impact extends beyond the vulnerable process to the host. Successful exploitation can lead to memory corruption, information disclosure, or denial of service depending on the array targeted and the operations performed on the malformed entry.
No verified public exploit code is available. Technical details are documented in the Talos Intelligence Vulnerability Report.
Detection Methods for CVE-2026-57265
Indicators of Compromise
- Unexpected crashes or restarts of the GeoWebPlayer process on hosts running GeoVision software.
- Browser sessions establishing WebSocket connections to the local GeoWebPlayer port from pages outside the GeoVision management interface.
- WebSocket command messages containing anomalously large or negative index values in application logs.
Detection Strategies
- Monitor endpoint process telemetry for GeoWebPlayer crashes and abnormal child processes spawned by the addon.
- Inspect browser origins connecting to the local GeoWebPlayer WebSocket endpoint and alert on origins outside the approved GeoVision web interface.
- Correlate GeoWebPlayer command activity with recent browser navigation events to identify drive-by triggers.
Monitoring Recommendations
- Enable verbose logging on the GeoWebPlayer service where supported and forward logs to a central SIEM for indexing.
- Track network connections to the localhost WebSocket port using host-based network telemetry.
- Alert on repeated malformed command messages or protocol errors originating from the WebSocket interface.
How to Mitigate CVE-2026-57265
Immediate Actions Required
- Inventory hosts running GeoVision software and confirm whether GeoWebPlayer, Web Plugin, or WS Player is installed.
- Apply vendor updates from the GeoVision Cyber Security page as soon as they are available.
- Restrict browser access on hosts running GeoWebPlayer to trusted GeoVision management interfaces only.
Patch Information
Refer to the GeoVision Cyber Security Overview for vendor advisories and patched builds. Consult the Talos Intelligence Vulnerability Report TALOS-2026-2373 for the technical write-up and affected versions.
Workarounds
- Uninstall GeoWebPlayer on hosts that do not require the addon for their GeoVision workflow.
- Block outbound WebSocket connections to the local GeoWebPlayer port from untrusted browser origins using host firewall or browser policy.
- Enforce browser isolation or dedicated management workstations for interacting with GeoVision interfaces.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
