CVE-2025-62404
📋 TL;DR
A heap-based buffer overflow vulnerability in TP-Link Archer AX53 v1.0 routers allows authenticated attackers on the same network to crash the device or potentially execute arbitrary code by sending specially crafted network packets. This affects the tmpserver modules in firmware versions through 1.3.1 Build 20241120. Attackers must have network adjacency and authentication to exploit this vulnerability.
💻 Affected Systems
- TP-Link Archer AX53 v1.0
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing remote code execution, persistent backdoor installation, and lateral movement to other network devices.
Likely Case
Denial of service causing router crashes and network disruption, requiring physical reset or firmware reflash.
If Mitigated
Limited to authenticated attackers on the local network, reducing exposure compared to internet-facing vulnerabilities.
🎯 Exploit Status
Requires authentication and network adjacency. Heap exploitation can be complex but buffer overflows are well-understood attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TP-Link support site for latest firmware
Vendor Advisory: https://www.tp-link.com/us/support/faq/4943/
Restart Required: Yes
Instructions:
1. Visit TP-Link support site for Archer AX53 v1.0. 2. Download latest firmware. 3. Log into router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Router will reboot automatically.
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface to separate VLAN to limit adjacent network access.
Strong Authentication
allUse complex, unique passwords for router admin access and enable multi-factor authentication if available.
🧯 If You Can't Patch
- Replace affected router with updated model or different vendor
- Implement strict network access controls and monitor for suspicious traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Tools > Firmware Upgrade. If version is 1.3.1 Build 20241120 or earlier, device is vulnerable.Check Version:
No CLI command - check via web interface at http://router.local or router IP addressVerify Fix Applied:
After firmware update, verify version shows newer than 1.3.1 Build 20241120 in admin interface.📡 Detection & Monitoring
Log Indicators:
- Repeated router crashes/reboots
- Unusual authentication attempts to router admin interface
- Large network packets to router management ports
Network Indicators:
- Unusually large packets to router management ports (typically 80/443)
- Traffic patterns suggesting buffer overflow attempts
SIEM Query:
source_ip IN (internal_range) AND dest_ip = router_ip AND (packet_size > threshold OR protocol_anomalies)