CVE-2025-12235
📋 TL;DR
A buffer overflow vulnerability in Tenda CH22 router firmware version 1.0.0.1 allows attackers on the local network to execute arbitrary code by manipulating the 'page' parameter in the fromSetIpBind function. This could lead to complete device compromise. Only Tenda CH22 routers running the vulnerable firmware are affected.
💻 Affected Systems
- Tenda CH22 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement to other devices.
Likely Case
Router compromise allowing attacker to modify network settings, intercept traffic, or use the router as a pivot point for further attacks.
If Mitigated
Limited impact if network segmentation prevents local network access or if the vulnerable interface is disabled.
🎯 Exploit Status
Public exploit code available on GitHub, requires local network access but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable web management interface
allDisable the vulnerable web interface to prevent exploitation
Network segmentation
allIsolate router management interface to trusted VLAN only
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict network access controls to limit who can reach the router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 1.0.0.1, device is vulnerable.Check Version:
Check via router web interface at 192.168.0.1 or 192.168.1.1Verify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/SetIpBind with manipulated page parameter
- Multiple failed buffer overflow attempts
Network Indicators:
- Unusual traffic patterns to router management interface from internal hosts
- Exploit payloads in HTTP requests
SIEM Query:
source_ip IN (internal_range) AND dest_ip = (router_ip) AND url_path = "/goform/SetIpBind" AND http_method = "POST"