CVE-2026-24920
📋 TL;DR
A permission control vulnerability in the AMS module could allow attackers to disrupt system availability. This affects Huawei devices running vulnerable versions of the AMS module. Users of affected Huawei products should apply patches immediately.
💻 Affected Systems
- Huawei devices with AMS module
📦 What is this software?
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability or denial of service affecting critical functions
Likely Case
Service disruption or performance degradation in affected AMS module components
If Mitigated
Minimal impact with proper access controls and network segmentation in place
🎯 Exploit Status
CWE-264 suggests permission/privilege issues, typically requiring some access level
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletins for specific fixed versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2026/2/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletin for affected products. 2. Apply security updates via official channels. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict AMS module access
allLimit network access to AMS module services
Implement strict permission controls
allApply principle of least privilege to AMS-related processes
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks
- Implement additional monitoring for AMS module activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Huawei security bulletinsCheck Version:
Device-specific (Settings > About > Build Number on Huawei devices)Verify Fix Applied:
Verify installed security patch level matches or exceeds recommended version📡 Detection & Monitoring
Log Indicators:
- Unusual AMS module permission changes
- AMS service crashes or restarts
Network Indicators:
- Unexpected connections to AMS service ports
SIEM Query:
Search for AMS module permission errors or service disruption events