CVE-2026-57273
HighCVSS 8.3Exploitation Probability (EPSS)
Low risk20th percentile — higher than 20% of all known CVEs
Summary
The GeoWebPlayer addon (Web Plugin/WS Player) for GeoVision software contains a buffer overflow vulnerability in the handle_connection_info function. An attacker from localhost can send a crafted JSON request that overflows a buffer in the username field due to manual byte-by-byte copying without length checks.
Risk Assessment
Buffer overflow may allow an attacker to execute arbitrary code in the context of the websocket server, leading to system compromise and potential access to cameras and other network resources.
Recommendation
Immediately update the GeoWebPlayer addon to the latest version from GeoVision. If no update is available, restrict websocket server access to trusted hosts or temporarily disable the addon.
Original NVD description (English source)
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 call`handle_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)