CVE-2025-20732
📋 TL;DR
A buffer overflow vulnerability in MediaTek Wi-Fi AP drivers allows local privilege escalation when an attacker already has system-level access. This affects devices using MediaTek wireless chipsets when OceReducedNeighborReport is disabled. Exploitation requires no user interaction.
💻 Affected Systems
- MediaTek Wi-Fi AP drivers
📦 What is this software?
Openwrt by Openwrt
Openwrt by Openwrt
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with kernel-level code execution, allowing complete device control and persistence.
Likely Case
Local privilege escalation from system-level access to kernel-level privileges, enabling further attacks.
If Mitigated
Limited impact if proper access controls prevent initial system compromise and patches are applied.
🎯 Exploit Status
Requires existing system-level access; out-of-bounds write in kernel driver.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: WCNCR00441510
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/November-2025
Restart Required: Yes
Instructions:
1. Check device uses MediaTek Wi-Fi chipset. 2. Apply patch WCNCR00441510 from vendor. 3. Reboot device. 4. Verify OceReducedNeighborReport is enabled if possible.
🔧 Temporary Workarounds
Enable OceReducedNeighborReport
linuxEnable the feature that prevents exploitation of this vulnerability
echo 1 > /sys/module/wlan/parameters/OceReducedNeighborReport
🧯 If You Can't Patch
- Enable OceReducedNeighborReport feature if available
- Restrict physical and network access to prevent initial system compromise
🔍 How to Verify
Check if Vulnerable:
Check if device uses MediaTek Wi-Fi driver and OceReducedNeighborReport is disabledCheck Version:
dmesg | grep -i mediatek || lsmod | grep -i wlanVerify Fix Applied:
Verify patch WCNCR00441510 is applied and OceReducedNeighborReport is enabled📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Wi-Fi driver crash logs
- Out-of-bounds memory access errors
Network Indicators:
- Unusual Wi-Fi driver behavior
- Multiple privilege escalation attempts
SIEM Query:
source="kernel" AND ("out of bounds" OR "buffer overflow" OR "wlan")