CVE-2025-26691
📋 TL;DR
This vulnerability in OpenHarmony allows a local attacker to bypass permission checks and access sensitive information they shouldn't have access to. It affects OpenHarmony v5.0.3 and earlier versions. The attacker needs local access to the device to exploit this information leak.
💻 Affected Systems
- OpenHarmony
📦 What is this software?
Openharmony by Openatom
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains unauthorized access to sensitive system information, user data, or application data that should be protected by permissions.
Likely Case
Local user or malicious app accesses information from other apps or system components without proper authorization.
If Mitigated
With proper permission controls and isolation, impact is limited to information the attacker already has some legitimate access to.
🎯 Exploit Status
Exploitation requires local access to the device. The vulnerability involves permission bypass to access information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OpenHarmony v5.0.4 or later
Vendor Advisory: https://gitee.com/openharmony/security/blob/master/zh/security-disclosure/2025/2025-06.md
Restart Required: Yes
Instructions:
1. Check current OpenHarmony version. 2. Update to OpenHarmony v5.0.4 or later. 3. Reboot the device after update. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and logical access to devices to trusted users only
Application isolation
allImplement strict application sandboxing and permission controls
🧯 If You Can't Patch
- Implement strict access controls to limit who can physically access devices
- Monitor for suspicious local activity and permission bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check OpenHarmony version: cat /etc/openharmony_version or equivalent system commandCheck Version:
cat /etc/openharmony_version || getprop ro.build.version.ohosVerify Fix Applied:
Verify version is v5.0.4 or later and test permission controls📡 Detection & Monitoring
Log Indicators:
- Unauthorized permission requests
- Access to protected resources without proper permissions
- Permission bypass attempts in system logs
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Search for permission bypass events or unauthorized access to protected resources in system logs