CVE-2025-9201
📋 TL;DR
A DLL hijacking vulnerability in Lenovo Browser allows local attackers to execute arbitrary code with elevated privileges by placing malicious DLLs in directories the application searches. This affects users running vulnerable versions of Lenovo Browser on Windows systems.
💻 Affected Systems
- Lenovo Browser
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains SYSTEM-level privileges, enabling complete system compromise, data theft, and persistence mechanisms.
Likely Case
Local user with limited privileges escalates to administrator rights, allowing installation of malware, credential harvesting, or lateral movement.
If Mitigated
With proper application whitelisting and least privilege principles, impact is limited to denial of service or local data access.
🎯 Exploit Status
DLL hijacking is a well-known attack vector requiring local access. No public exploit code is mentioned in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in advisory; refer to Lenovo security update.
Vendor Advisory: https://iknow.lenovo.com.cn/detail/431735
Restart Required: Yes
Instructions:
1. Visit Lenovo security advisory. 2. Download and install the latest Lenovo Browser update. 3. Restart the system to ensure changes take effect.
🔧 Temporary Workarounds
Remove vulnerable application
windowsUninstall Lenovo Browser if not required, eliminating the attack surface.
Control Panel > Programs > Uninstall Lenovo Browser
Restrict DLL search paths
windowsUse Windows policies to restrict DLL loading from untrusted directories.
Set SafeDllSearchMode registry key to 1: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\SafeDllSearchMode
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized DLLs.
- Enforce least privilege principles: ensure users run with minimal necessary permissions.
🔍 How to Verify
Check if Vulnerable:
Check Lenovo Browser version against patched release in Lenovo advisory. If unpatched and application is present, assume vulnerable.Check Version:
Check Lenovo Browser 'About' section or Windows Programs list for version information.Verify Fix Applied:
Verify Lenovo Browser is updated to latest version and test DLL loading behavior in controlled environment.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs: Process creation events showing DLL loading from unusual paths, especially with elevated privileges.
Network Indicators:
- None - this is a local attack vector.
SIEM Query:
EventID=4688 OR EventID=1 (Sysmon) WHERE NewProcessName contains 'LenovoBrowser.exe' AND ParentProcess has elevated privileges