CVE-2026-16519: GeoVision DLL Hijacking Vulnerability

CVE-2026-16519 Overview

CVE-2026-16519 is a DLL hijacking vulnerability in the GeoVision GV-IP Device Utility desktop application. The application loads dynamic-link libraries (DLLs) from an unsafe search path. A local attacker who can write to a directory searched before the legitimate library location can place a malicious DLL that the utility loads at runtime.

Successful exploitation gives the attacker code execution in the context of the user running the utility. The flaw is tracked under CWE-427: Uncontrolled Search Path Element and requires user interaction to trigger the vulnerable load path.

Critical Impact
A local attacker with low privileges can achieve arbitrary code execution in the security context of the GV-IP Device Utility user, compromising confidentiality, integrity, and availability of the host.

Affected Products

GeoVision GV-IP Device Utility (desktop application)
Windows hosts running the GeoVision GV-IP Device Utility
Environments provisioning GeoVision IP cameras and encoders with the utility

Discovery Timeline

2026-07-24 - CVE-2026-16519 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-16519

Vulnerability Analysis

The GV-IP Device Utility resolves one or more DLL dependencies through an unsafe search order. Windows applications that call LoadLibrary without specifying an absolute path fall back to the standard DLL search sequence. When that sequence includes writable directories controlled by a low-privileged user, an attacker can plant a rogue DLL with a name the application will attempt to load.

Exploitation runs the attacker's code inside the utility process on the next launch. Because the primitive is code execution rather than data disclosure, it can be chained with post-compromise techniques such as persistence, credential access, or lateral movement to camera management infrastructure.

Root Cause

The root cause is CWE-427: Uncontrolled Search Path Element. The utility does not enforce a fully qualified path or use SetDefaultDllDirectories with LOAD_LIBRARY_SEARCH_SYSTEM32 to restrict where dependencies are resolved. As a result, directories such as the current working directory or the application install directory become viable planting locations if they permit user writes.

Attack Vector

The attack vector is local. An attacker must place a crafted DLL on the target system in a directory searched by the utility before the legitimate library location. User interaction is required, typically the user launching the GV-IP Device Utility or opening a file that triggers the affected load. Once the malicious DLL loads, the attacker executes arbitrary code with the privileges of the invoking user.

No verified proof-of-concept code has been published. The vulnerability mechanism follows the standard DLL search-order hijacking pattern documented for Windows applications. Refer to the GeoVision Cyber Security Overview for vendor guidance.

Detection Methods for CVE-2026-16519

Indicators of Compromise

Unsigned or unexpected DLL files present in the GV-IP Device Utility installation directory or in directories in the process working path
DLLs loaded by the GV-IP Device Utility process that do not carry a valid GeoVision digital signature
New DLL files created shortly before the utility is launched by an interactive user

Detection Strategies

Baseline the legitimate DLLs shipped with the GV-IP Device Utility and alert on any deviation in file hash, path, or signer
Monitor process image loads for the utility executable and flag modules loaded from non-standard directories such as user profile or temp paths
Correlate DLL creation events with subsequent process starts of the utility to detect plant-and-trigger sequences

Monitoring Recommendations

Enable Sysmon Event ID 7 (Image Loaded) with filtering on the GV-IP Device Utility process to capture module loads
Track file creation events (Event ID 11) in the utility install directory and any directory on the DLL search path
Review endpoint identification telemetry for anomalous child processes spawned by the utility after launch

How to Mitigate CVE-2026-16519

Immediate Actions Required

Restrict write permissions on the GV-IP Device Utility installation directory to administrators only
Remove the utility from shared or multi-user workstations where non-administrative users can stage files
Instruct operators to launch the utility only from a trusted, protected directory and never from Downloads or removable media

Patch Information

GeoVision has not published a specific fixed version in the NVD entry at the time of publication. Consult the GeoVision Cyber Security Overview for the latest advisories and patched builds. Apply vendor updates as soon as they become available and validate the utility loads only signed DLLs from protected paths after patching.

Workarounds

Run the utility from a directory where only administrators have write access to eliminate common plant locations
Use Windows AppLocker or Windows Defender Application Control to block execution and DLL loads of unsigned modules
Apply the CWDIllegalInDllSearch registry mitigation to remove the current working directory from the DLL search order

bash

# Enable Safe DLL Search Mode and remove CWD from DLL search order (run as Administrator)
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" /v SafeDllSearchMode /t REG_DWORD /d 1 /f
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" /v CWDIllegalInDllSearch /t REG_DWORD /d 0xFFFFFFFF /f