CVE-2021-22387
📋 TL;DR
This vulnerability in Huawei smartphones allows improper control of dynamically managed code resources, potentially enabling remote command execution. Attackers could exploit this to run arbitrary code on affected devices. All users of vulnerable Huawei smartphone models are affected.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing remote attackers to execute arbitrary commands, install malware, steal data, or gain persistent access.
Likely Case
Remote code execution leading to data theft, surveillance, or device takeover for botnet participation.
If Mitigated
Limited impact with proper network segmentation and security controls preventing exploitation attempts.
🎯 Exploit Status
CVSS 9.8 suggests critical severity with high attack vector; Huawei's description indicates remote exploitation possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security updates for specific device models
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/6/
Restart Required: Yes
Instructions:
1. Check for security updates in device Settings > System & updates > Software update. 2. Install available updates immediately. 3. Restart device after update completes.
🔧 Temporary Workarounds
Network segmentation
allRestrict device network access to trusted networks only
App installation restrictions
allDisable installation from unknown sources and review app permissions
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and internet access
- Implement mobile device management (MDM) with strict security policies
🔍 How to Verify
Check if Vulnerable:
Check device model and software version against Huawei's security bulletin for June 2021Check Version:
Settings > About phone > Build number / Software versionVerify Fix Applied:
Verify software version is updated beyond vulnerable versions listed in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Unusual process execution, privilege escalation attempts, unexpected network connections from device
Network Indicators:
- Suspicious outbound connections from smartphone to unknown IPs, unusual command and control traffic
SIEM Query:
Device logs showing unexpected process creation or network connections from Huawei smartphones