CVE-2025-20663
📋 TL;DR
This vulnerability in MediaTek wlan AP driver allows unauthenticated attackers within wireless range to potentially access sensitive information from affected devices without user interaction. It affects devices using MediaTek Wi-Fi chipsets with vulnerable driver versions.
💻 Affected Systems
- MediaTek Wi-Fi chipsets with wlan AP driver
📦 What is this software?
Mt7915 by Mediatek
Mt7916 by Mediatek
Mt7981 by Mediatek
Mt7986 by Mediatek
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker within wireless range could extract sensitive information including network credentials, device identifiers, or potentially memory contents from vulnerable devices.
Likely Case
Information disclosure of device-specific data or network configuration details to nearby attackers.
If Mitigated
Limited impact with proper network segmentation and wireless security controls in place.
🎯 Exploit Status
No authentication required, attacker must be within wireless range (proximal/adjacent).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: WCNCR00408868
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/April-2025
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply MediaTek patch WCNCR00408868. 3. Reboot device after patching.
🔧 Temporary Workarounds
Disable vulnerable Wi-Fi interfaces
linuxTemporarily disable Wi-Fi AP functionality on affected devices
ip link set wlan0 down
Restrict wireless network access
allImplement strict wireless access controls and network segmentation
🧯 If You Can't Patch
- Segment wireless networks from critical infrastructure
- Monitor for unusual wireless activity and implement strict access controls
🔍 How to Verify
Check if Vulnerable:
Check device specifications for MediaTek Wi-Fi chipset and review firmware version against vendor advisory.Check Version:
Check device manufacturer's firmware update utility or system informationVerify Fix Applied:
Verify patch WCNCR00408868 is applied by checking firmware/driver version.📡 Detection & Monitoring
Log Indicators:
- Unusual wireless driver errors or exceptions in system logs
Network Indicators:
- Unexpected wireless probe requests or association attempts
SIEM Query:
Wireless driver exceptions OR wlan AP driver errors