CVE-2026-57273: GeoWebPlayer Buffer Overflow in connectionInfo Handler (CVSS 8.3)

Technical summary

CVE-2026-57273 is a stack-based buffer overflow vulnerability (CWE-120) in the GeoWebPlayer websocket server's `handle_connection_info` command handler. The vulnerability exists in multiple instances of unsafe string copy operations that process attacker-controlled JSON fields without bounds checking. The affected function uses manual byte-by-byte loop constructs to copy JSON string values into statically allocated buffers, omitting length validation. The attack vector requires network access to the websocket server (typically bound to localhost), user interaction to trigger the vulnerable command path, and the ability to inject or manipulate JSON payloads. The CVSS 3.1 score of 8.3 (HIGH) reflects the combination of remote network access, moderate attack complexity due to localhost binding and UI requirement, and the potential for confidentiality, integrity, and system availability compromise across connected systems.

Business impact

Successful exploitation could allow an attacker to execute arbitrary code on systems running vulnerable GeoVision surveillance infrastructure. This poses direct risk to surveillance system integrity, potential unauthorized access to video streams and camera credentials, and lateral movement into connected networks. Organizations relying on GeoVision deployments for physical security monitoring face operational disruption, data exfiltration of security footage, and potential compliance violations (HIPAA, PCI-DSS, SOC 2) depending on the surveillance scope. The localhost-only nature of the initial attack vector limits exposure, but misconfigured networks or cross-site request forgery (CSRF) scenarios could expand the attack surface.

Affected systems

GeoWebPlayer plugin when deployed with GeoVision products including GV-VMS (Video Management System), GV-Cloud, and other GeoVision software bundles that include the websocket server component. The vulnerability affects systems where the plugin is actively installed and the websocket server is listening. No specific version ranges were provided in the source data; verify affected versions against the official GeoVision security advisory.

Exploitability

The vulnerability requires an attacker to craft a malicious JSON payload targeting the `connectionInfo` command and transmit it to the GeoWebPlayer websocket server. The localhost-only binding significantly restricts direct remote exploitation, making this primarily exploitable by local network access, malware already resident on the system, or via CSRF from a web application running on the same machine. The CVSS vector includes a requirement for user interaction and high attack complexity, indicating the attack is not trivial but remains feasible for a motivated adversary with appropriate positioning. The vulnerability is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, suggesting active exploitation in the wild has not been widely reported, though this does not guarantee zero public tooling.

Remediation

Organizations should prioritize patching GeoWebPlayer to a version that implements proper input validation and safe string handling (e.g., using length-limited functions or safe library alternatives). Until patching is possible, apply network segmentation to restrict access to the websocket server to only authorized administrative interfaces, and monitor for suspicious JSON payloads targeting the `connectionInfo` command. Consider disabling GeoWebPlayer on systems where the advanced web interface features are not essential. Verify the specific patched version numbers against GeoVision's official security advisory, as version guidance was not provided in the source data.

Patch guidance

Contact GeoVision for security updates that address the buffer overflow in the `handle_connection_info` function. Updates should enforce strict input length validation before copying any JSON-derived strings into fixed buffers. If automatic patching is not immediately available, apply compensating controls: isolate the websocket server behind a firewall, restrict network access to localhost or trusted administrative subnets, and disable the GeoWebPlayer plugin if it is not actively required. Test patches in a non-production environment before full deployment to ensure compatibility with existing camera and system configurations.

Detection guidance

Monitor for network traffic to the GeoWebPlayer websocket server (typically on localhost) containing oversized JSON payloads in the `connectionInfo` command. Look for error logs or crashes in the GeoWebPlayer process that coincide with unusual web requests. Intrusion detection systems can be tuned to flag JSON payloads exceeding typical field lengths for connection metadata. Additionally, monitor system process execution for unexpected child processes spawned from the GeoWebPlayer server, which could indicate code execution. Memory dumps or crash reports from the affected process may contain evidence of buffer overflow exploitation patterns.

Why prioritize this

Despite not being actively exploited at scale (KEV status: false), this vulnerability warrants prioritization due to its HIGH CVSS score (8.3), potential for arbitrary code execution on surveillance infrastructure, and the critical role GeoVision systems play in physical security. The localhost-only requirement reduces urgency slightly compared to fully remote vulnerabilities, but organizations with GeoWebPlayer deployed should patch as soon as feasible. Surveillance systems are high-value targets for nation-state and criminal actors seeking to disable security monitoring or exfiltrate sensitive footage.

Risk score, explained

The CVSS 3.1 score of 8.3 (HIGH) combines: (1) Network attack vector, reflecting the websocket interface; (2) High attack complexity due to localhost binding and user interaction requirement; (3) No privilege escalation needed; (4) System scope change, indicating potential impact beyond the affected component; (5) High confidentiality, integrity, and availability impact from arbitrary code execution. The score accurately reflects a serious but not trivially exploitable vulnerability that requires either local network presence or social engineering to trigger.

Frequently asked questions