CVE-2026-57272 Overview
CVE-2026-57272 is an out-of-bounds array access vulnerability in GeoVision GeoWebPlayer, an addon distributed with GeoVision software such as GV-VMS and GV-Cloud. The component is also referred to as Web Plugin in GV-VMS documentation and WS Player in 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 reference internal arrays. Because the index value is not validated against array bounds, attackers can trigger out-of-bounds access through the byPass command, categorized under improper validation of array index [CWE-129].
Critical Impact
Successful exploitation can lead to memory corruption impacting confidentiality, integrity, and availability of the affected GeoVision host system.
Affected Products
- GeoVision GeoWebPlayer (Web Plugin)
- GeoVision GV-VMS deployments bundling the Web Plugin
- GeoVision GV-Cloud / VMS-Cloud WS Player installations
Discovery Timeline
- 2026-07-02 - CVE-2026-57272 published to NVD
- 2026-07-02 - Last updated in NVD database
Technical Details for CVE-2026-57272
Vulnerability Analysis
GeoWebPlayer installs a local WebSocket server that accepts control messages from processes running on localhost. The server exposes multiple commands used by GeoVision web interfaces to orchestrate playback and streaming actions. Many of these commands accept an attacker-influenced index field that is used to index into internal arrays for entering critical sections, dispatching function calls, and retrieving state.
The byPass command demonstrates the flaw. The handler reads the index value from the incoming JSON payload and passes it directly to array element accessors without verifying that the value falls within the allocated bounds. As a result, negative or oversized indices reach adjacent memory, resulting in out-of-bounds reads or writes depending on the accessed array.
The attack vector is scored as network with high attack complexity because exploitation typically requires user interaction. A victim must visit an attacker-controlled page that establishes a WebSocket connection to the local GeoWebPlayer service and issues the malformed command.
Root Cause
The root cause is the absence of range validation on the index parameter received from WebSocket clients. The improper validation of array index [CWE-129] allows the command handler to dereference memory outside the array intended for legitimate lookups.
Attack Vector
An attacker lures a user with GeoWebPlayer installed into loading a crafted web page. The page opens a WebSocket connection to the local GeoWebPlayer server and sends a byPass command containing an out-of-range index. Because the WebSocket listener trusts localhost traffic and does not sanitize the index, the malicious command reaches the vulnerable handler. Successful exploitation can corrupt memory or leak sensitive process state depending on which array is accessed.
No verified public exploit code is available. See the Talos Intelligence Vulnerability Report for a technical breakdown of the affected command handlers.
Detection Methods for CVE-2026-57272
Indicators of Compromise
- Unexpected WebSocket connections to the GeoWebPlayer localhost port originating from browser sessions on untrusted sites.
- GeoWebPlayer process crashes or abnormal termination coinciding with browsing activity.
- Presence of malformed JSON payloads containing byPass commands with unusual index values in local WebSocket logs.
Detection Strategies
- Monitor GeoWebPlayer process stability and capture crash dumps referencing array access functions.
- Inspect browser telemetry for outbound WebSocket handshakes targeting the local GeoWebPlayer listener from non-GeoVision origins.
- Correlate GeoVision service restarts with recent web browsing events on the same host.
Monitoring Recommendations
- Enable verbose logging in GeoWebPlayer where available and forward events to a centralized log platform.
- Alert on repeated GeoWebPlayer crashes across endpoints to identify systemic exploitation attempts.
- Track network connections initiated by browsers to the loopback interface on GeoWebPlayer ports.
How to Mitigate CVE-2026-57272
Immediate Actions Required
- Apply the vendor update from the GeoVision Cyber Security Overview as soon as it is published for your product.
- Restrict use of GeoWebPlayer to trusted browsing sessions and avoid unknown links while the addon is active.
- Inventory endpoints with GeoWebPlayer, GV-VMS, or VMS-Cloud installations to prioritize remediation.
Patch Information
Refer to the Talos Intelligence Vulnerability Report and the GeoVision Cyber Security Overview for the current fixed version and download instructions. Upgrade all affected GeoWebPlayer installations to the vendor-supplied patched release.
Workarounds
- Uninstall GeoWebPlayer on systems that do not require the local WebSocket bridge for GeoVision web interfaces.
- Block loopback WebSocket traffic to the GeoWebPlayer port using host firewall rules when the plugin is not in active use.
- Configure browsers to disable WebSocket connections to localhost from untrusted origins where policy controls allow.
# Example: block the GeoWebPlayer WebSocket listener on Windows when not in use
netsh advfirewall firewall add rule name="Block GeoWebPlayer WS" ^
dir=in action=block protocol=TCP localport=<GeoWebPlayer_port> ^
interfacetype=loopback
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
