CVE-2025-4272 Overview
CVE-2025-4272 is an uncontrolled search path vulnerability [CWE-426] in Mechrevo Control Console version 1.0.2.70. The flaw resides in the csCAPI.dll library located at C:\Program Files\OEM\MECHREVO Control Center\UniwillService\MyControlCenter\csCAPI.dll, which is loaded by the GCUService component. A local attacker who can place a malicious DLL in a directory searched before the legitimate library can achieve code execution in the context of the vulnerable service. Public disclosure indicates the exploit details are available, though successful exploitation requires local access and elevated complexity.
Critical Impact
Successful exploitation allows local attackers to load an attacker-controlled DLL through the GCUService, resulting in code execution with the privileges of the affected service.
Affected Products
- Mechrevo Control Console 1.0.2.70
- csCAPI.dll library within MECHREVO Control Center
- GCUService component (UniwillService / MyControlCenter)
Discovery Timeline
- 2025-05-05 - CVE-2025-4272 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-4272
Vulnerability Analysis
The vulnerability is classified as an uncontrolled search path element [CWE-426]. The GCUService component of Mechrevo Control Console loads csCAPI.dll without fully qualifying its location or validating trust boundaries of the search path. When Windows resolves the DLL name, it consults a sequence of directories. If an attacker-controlled directory precedes the legitimate location in that search sequence, Windows loads the malicious library instead of the intended one.
The attack requires local access and has high attack complexity. The impact spans confidentiality, integrity, and availability because the loaded DLL executes inside a trusted service process. Public sources indicate that exploitation details have been disclosed, though reliable exploitation is described as difficult.
Root Cause
The root cause is the failure of the GCUService component to specify a fully qualified path or apply secure DLL loading practices when resolving csCAPI.dll. Windows falls back to directory search order, which can include locations writable by non-privileged users or influenced by the invoking environment. This allows a malicious DLL with the same file name to be loaded in place of the legitimate library.
Attack Vector
An attacker with local access places a crafted csCAPI.dll file in a directory that Windows searches before the intended installation directory. When the GCUService component starts or reloads the library, it loads the attacker's DLL. The malicious code then runs within the service's process context, inheriting its privileges. Technical write-ups referenced in the advisory include the VulDB entry #307376 and the Yuque research document.
No verified public exploit code is included here. See the external references above for technical details.
Detection Methods for CVE-2025-4272
Indicators of Compromise
- Presence of csCAPI.dll files outside the canonical path C:\Program Files\OEM\MECHREVO Control Center\UniwillService\MyControlCenter\.
- Unexpected child processes or network connections originating from the GCUService process.
- Modifications to directories included in the DLL search order for the Mechrevo service.
Detection Strategies
- Monitor image load events (Windows Event ID 7 via Sysmon) for csCAPI.dll loaded from non-standard paths by the GCUService process.
- Alert on file creation events for csCAPI.dll in any directory other than the vendor installation path.
- Baseline the loaded module list of GCUService and flag deviations in the DLL search order.
Monitoring Recommendations
- Track integrity of the MECHREVO Control Center installation directory and permissions on parent folders.
- Correlate service restart events with new DLL loads to catch DLL hijacking attempts.
- Review local privilege escalation attempts against workstations running Mechrevo laptops or preinstalled OEM software.
How to Mitigate CVE-2025-4272
Immediate Actions Required
- Restrict write permissions on all directories in the DLL search path used by GCUService, particularly any user-writable locations.
- Audit workstations for the presence of Mechrevo Control Console 1.0.2.70 and inventory installations of csCAPI.dll.
- Disable the GCUService where the Mechrevo Control Center is not required for hardware operation.
Patch Information
At the time of this writing, no vendor patch has been referenced in the NVD entry. Consult the VulDB advisory and Mechrevo product support channels for updated firmware or software releases addressing CVE-2025-4272.
Workarounds
- Enforce application allowlisting to prevent unauthorized DLLs from loading into the GCUService process.
- Apply Windows SafeDllSearchMode and process-level mitigation policies that restrict DLL loading to signed images from trusted paths.
- Remove non-administrative write access to the MECHREVO Control Center installation tree and any parent directory used during service startup.
# Configuration example: enforce Safe DLL Search Mode via registry
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" /v SafeDllSearchMode /t REG_DWORD /d 1 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
