CVE-2023-49907
📋 TL;DR
A stack-based buffer overflow vulnerability in the TP-Link EAP225 v3 access point's web interface allows authenticated attackers to execute arbitrary code remotely. This affects the Radio Scheduling functionality via the 'band' parameter. Organizations using TP-Link AC1350 Wireless MU-MIMO Gigabit Access Point (EAP225 V3) v5.1.0 Build 20220926 are vulnerable.
💻 Affected Systems
- TP-Link AC1350 Wireless MU-MIMO Gigabit Access Point (EAP225 V3)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to persistent backdoor installation, network pivoting, and complete control of the access point.
Likely Case
Unauthorized access to the access point configuration, network disruption, and potential credential theft from connected devices.
If Mitigated
Limited to authenticated attackers only, reducing exposure if strong authentication is enforced.
🎯 Exploit Status
Exploitation requires authentication but detailed technical analysis is publicly available from Talos Intelligence.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TP-Link for latest firmware updates
Vendor Advisory: https://www.tp-link.com/support/download/eap225/v3/
Restart Required: Yes
Instructions:
1. Log into TP-Link support portal. 2. Download latest firmware for EAP225 v3. 3. Upload firmware via web interface. 4. Reboot device after update completes.
🔧 Temporary Workarounds
Disable Web Interface
allDisable the web management interface if not required for operations
Restrict Access
allLimit web interface access to specific management IP addresses only
🧯 If You Can't Patch
- Isolate the access point on a dedicated VLAN with strict firewall rules
- Implement strong authentication and change default credentials immediately
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: System Tools > Firmware UpgradeCheck Version:
No CLI command available - check via web interface onlyVerify Fix Applied:
Verify firmware version is newer than v5.1.0 Build 20220926📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login and unusual HTTP requests to Radio Scheduling endpoint
Network Indicators:
- Unusual HTTP POST requests to /cgi-bin/luci/ containing malformed band parameter
SIEM Query:
source="eap225" AND (url="/cgi-bin/luci/" AND method="POST" AND params CONTAINS "band=")