CVE-2021-37002
📋 TL;DR
This is a critical memory corruption vulnerability in Huawei smartphones that allows attackers to execute arbitrary code by exploiting out-of-bounds memory access. It affects specific Huawei smartphone models running vulnerable software versions. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Full device takeover with root/system privileges, allowing data theft, surveillance, ransomware deployment, and persistent backdoor installation.
Likely Case
Remote code execution leading to data exfiltration, credential theft, and installation of malicious apps without user interaction.
If Mitigated
Limited impact if devices are patched, isolated from untrusted networks, and have security features enabled.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with high attack vector complexity. No public exploit code is known, but the vulnerability is remotely exploitable without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2021 security patch or later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/7/
Restart Required: Yes
Instructions:
1. Go to Settings > System & updates > Software update. 2. Check for updates. 3. Install the July 2021 security patch or later. 4. Restart the device after installation.
🔧 Temporary Workarounds
Network isolation
allRestrict device access to trusted networks only to reduce attack surface
Disable unnecessary services
allTurn off Bluetooth, Wi-Fi, and mobile data when not in use
🧯 If You Can't Patch
- Isolate affected devices from internet and untrusted networks
- Implement strict application whitelisting and disable app installations from unknown sources
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build number. If patch level is before July 2021, device is vulnerable.Check Version:
Not applicable for mobile devices; use Settings menu as describedVerify Fix Applied:
Verify security patch level shows July 2021 or later in Settings > About phone > Build number📡 Detection & Monitoring
Log Indicators:
- Unusual process creation, memory access violations, or crash reports in system logs
Network Indicators:
- Suspicious network connections from device to unknown IPs, unusual data exfiltration patterns
SIEM Query:
Not typically applicable for consumer mobile devices; monitor for device compromise indicators in enterprise MDM solutions