CVE-2023-49911
📋 TL;DR
A stack-based buffer overflow vulnerability in TP-Link EAP225 v3 access points allows authenticated attackers to execute arbitrary code remotely via specially crafted HTTP requests to the Radio Scheduling web interface. This affects organizations using these specific access points with vulnerable firmware versions. Attackers could gain full control of the device.
💻 Affected Systems
- TP-Link AC1350 Wireless MU-MIMO Gigabit Access Point (EAP225 V3)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to network pivot, credential theft, and persistent backdoor installation.
Likely Case
Attacker gains shell access on the access point, potentially intercepting network traffic or attacking other devices.
If Mitigated
Limited to authenticated users only, reducing attack surface if strong authentication is enforced.
🎯 Exploit Status
Detailed technical analysis available in Talos reports. Requires authentication but exploit is well-documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TP-Link for latest firmware updates
Vendor Advisory: https://www.tp-link.com/support/download/
Restart Required: Yes
Instructions:
1. Log into TP-Link support site. 2. Download latest firmware for EAP225 v3. 3. Access device web interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and apply new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Disable web interface access
allRestrict access to the management interface to trusted networks only
Implement strong authentication
allUse complex passwords and consider multi-factor authentication if supported
🧯 If You Can't Patch
- Isolate affected devices in separate VLAN with strict network segmentation
- Implement network monitoring for unusual HTTP requests to the management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: System > Status > Firmware VersionCheck Version:
Check via web interface or SSH if enabled: show versionVerify Fix Applied:
Verify firmware version is newer than v5.1.0 Build 20220926📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to Radio Scheduling endpoint
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- HTTP requests with unusually long band parameter values
- Traffic to management interface from unexpected sources
SIEM Query:
source="access_point_logs" AND (uri="/radio_scheduling" OR parameter="band") AND size>1000