CVE-2025-1853
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda AC8 routers allows remote attackers to execute arbitrary code by manipulating the 'list' parameter in the SetIpMacBind function. This affects Tenda AC8 routers running firmware version 16.03.34.06. Attackers can exploit this remotely without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda AC8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, allowing attackers to install persistent malware, pivot to internal networks, or create botnet nodes.
Likely Case
Remote code execution enabling device takeover, network traffic interception, or denial of service against the router.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal threats remain.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. If an update is available, download the latest firmware. 3. Log into the router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to the router's admin interface by disabling remote management features.
Network segmentation
allIsolate the router on a dedicated network segment with strict firewall rules limiting inbound traffic.
🧯 If You Can't Patch
- Replace affected routers with patched or different models
- Implement strict network access controls to limit exposure to the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface; if version is 16.03.34.06, device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Version page.Verify Fix Applied:
After updating firmware, verify the version has changed from 16.03.34.06 to a newer patched version.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/SetIpMacBind with manipulated 'list' parameter
- Router crash or reboot logs
Network Indicators:
- Suspicious traffic patterns to router management interface from unexpected sources
SIEM Query:
source="router_logs" AND uri="/goform/SetIpMacBind" AND parameter="list" AND length>normal_threshold