CVE-2025-56802
📋 TL;DR
The Reolink desktop application uses a predictable AES encryption key to protect user configuration files, allowing attackers with local system access to decrypt sensitive application data stored in %APPDATA%. This affects users of the Reolink desktop application on Windows systems. The vendor disputes the vulnerability, claiming keys are randomly generated per installation.
💻 Affected Systems
- Reolink desktop application
📦 What is this software?
Reolink by Reolink
⚠️ Risk & Real-World Impact
Worst Case
Attackers with local access could decrypt configuration files containing sensitive application data, potentially exposing credentials, camera settings, or other private information.
Likely Case
Malware or malicious users on the same system could access and decrypt Reolink configuration files to gather information about the user's camera setup.
If Mitigated
With proper access controls and limited local user privileges, the impact is reduced to authorized users only.
🎯 Exploit Status
Proof of concept code is available on GitHub. Exploitation requires local system access to read configuration files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor disputes vulnerability
Restart Required: No
Instructions:
No official patch available. Monitor Reolink updates for security fixes.
🔧 Temporary Workarounds
Restrict local file access
windowsApply strict file permissions to Reolink configuration directories to limit access to authorized users only
icacls "%APPDATA%\Reolink" /inheritance:r /grant:r "%USERNAME%:(OI)(CI)F" /grant:r "SYSTEM:(OI)(CI)F"
Use application whitelisting
allImplement application control policies to prevent unauthorized access to Reolink configuration files
🧯 If You Can't Patch
- Limit user privileges on systems running Reolink application
- Monitor access to Reolink configuration files in %APPDATA%
🔍 How to Verify
Check if Vulnerable:
Check if Reolink desktop application is installed and examine configuration files in %APPDATA%\Reolink for encrypted dataCheck Version:
Check Reolink application version through the application's about dialog or installed programs listVerify Fix Applied:
Verify that configuration files are no longer encrypted with predictable keys or that new versions use proper encryption📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to Reolink configuration files
- Failed attempts to access encrypted configuration data
Network Indicators:
- None - this is a local file system vulnerability
SIEM Query:
EventID=4663 AND ObjectName LIKE '%APPDATA%\Reolink%' AND AccessMask IN ('0x10000', '0x120089')