CVE-2026-92838 Overview
CVE-2026-92838 is a DLL hijacking vulnerability affecting the GeoVision GV-Remote E-Map desktop application. The application loads one or more 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 plant a malicious DLL. When the application starts, it loads the attacker-controlled library and executes code in the security context of the GV-Remote E-Map process. The weakness is tracked as CWE-427: Uncontrolled Search Path Element.
Critical Impact
Successful exploitation grants arbitrary code execution in the process context of GV-Remote E-Map, enabling local privilege escalation or persistence on affected hosts.
Affected Products
- GeoVision GV-Remote E-Map desktop application
- Related GeoVision surveillance client software using the same DLL loader logic
- Windows endpoints where GV-Remote E-Map is installed
Discovery Timeline
- 2026-09-17 - CVE-2026-92838 published to the National Vulnerability Database
- 2026-09-17 - Last updated in NVD database
Technical Details for CVE-2026-92838
Vulnerability Analysis
The GV-Remote E-Map application resolves DLL dependencies using an insecure search order. Windows applications that call LoadLibrary without a fully qualified path traverse a sequence of directories, starting with the application directory and continuing through user-writable locations. When a required DLL is missing from a trusted directory, Windows continues the search into locations an attacker may control.
An attacker who drops a DLL matching the expected filename into an earlier directory in the search order causes the application to load the malicious code. The loaded code executes with the privileges of the user running GV-Remote E-Map. On systems where the application runs with elevated rights, the impact extends to full local compromise.
Root Cause
The root cause is improper control of the DLL search path [CWE-427]. The application does not enforce absolute paths, does not validate library signatures, and does not call SetDefaultDllDirectories to restrict searches to system-protected locations.
Attack Vector
Exploitation requires local write access to a directory that Windows searches before the legitimate DLL location. The attacker plants a crafted DLL implementing the exported functions the application expects. When a user launches GV-Remote E-Map, the loader binds to the malicious DLL and executes DllMain code. See the HackerOne Report #1437942 and CVE-2020-26947 Record for related technical details on similar DLL search-order abuse patterns.
No verified public exploit code is available. The vulnerability mechanism follows the well-documented DLL preloading pattern rather than a novel exploitation technique.
Detection Methods for CVE-2026-92838
Indicators of Compromise
- Unsigned or unexpected DLL files present in the GV-Remote E-Map installation directory or user-writable directories in the search path
- New DLLs with filenames matching known dependencies of the GV-Remote E-Map process appearing shortly before application launch
- Child processes spawned from gv-remote-emap.exe that do not match normal application behavior, such as cmd.exe, powershell.exe, or rundll32.exe
- Outbound network connections from the GV-Remote E-Map process to unexpected destinations
Detection Strategies
- Enumerate loaded modules for the GV-Remote E-Map process and compare against a known-good DLL baseline
- Alert on LoadImage events where the loaded DLL is unsigned or resides outside the vendor installation directory
- Correlate file-write events targeting the application directory with subsequent process start events for the affected binary
Monitoring Recommendations
- Enable Sysmon Event ID 7 (ImageLoaded) with filters for the GV-Remote E-Map process image
- Monitor Windows Defender Application Control or AppLocker events for blocked DLL loads
- Track file integrity for the application installation directory and user profile paths
How to Mitigate CVE-2026-92838
Immediate Actions Required
- Restrict write permissions on the GV-Remote E-Map installation directory to administrators only
- Audit all user-writable directories referenced in the process DLL search path and remove non-vendor DLLs
- Limit local user accounts that can execute GV-Remote E-Map to reduce the attacker footprint
- Review the GeoVision Cyber Security Overview page for vendor advisories
Patch Information
No vendor patch reference is included in the current NVD entry. Consult the GeoVision Cyber Security Overview portal for updated releases addressing the DLL search path handling in GV-Remote E-Map.
Workarounds
- Enforce application allowlisting with Windows Defender Application Control to block unsigned DLLs from loading into the GV-Remote E-Map process
- Set NTFS access control lists on the application directory to deny write access to standard users
- Run GV-Remote E-Map from a directory owned by SYSTEM or Administrators only, ensuring no user-writable path precedes it in the search order
- Deploy Microsoft EMET-style or built-in mitigation flags such as ProcessImageLoadPolicy to prevent loading of remote or low-integrity DLLs
# Configuration example: restrict write access to the GV-Remote E-Map install directory
icacls "C:\Program Files\GeoVision\GV-Remote E-Map" /inheritance:r
icacls "C:\Program Files\GeoVision\GV-Remote E-Map" /grant:r "Administrators:(OI)(CI)F" "SYSTEM:(OI)(CI)F" "Users:(OI)(CI)RX"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
