CVE-2025-13306
📋 TL;DR
This CVE describes a command injection vulnerability in D-Link routers that allows attackers to execute arbitrary commands on affected devices by manipulating the 'host' parameter in the /boafrm/formDebugDiagnosticRun endpoint. The vulnerability affects D-Link DWR-M920, DWR-M921, DIR-822K, and DIR-825M routers running firmware version 1.1.5. Remote exploitation is possible, potentially allowing attackers to gain control of vulnerable devices.
💻 Affected Systems
- D-Link DWR-M920
- D-Link DWR-M921
- D-Link DIR-822K
- D-Link DIR-825M
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing persistent backdoor installation, credential theft, network pivoting, and participation in botnets.
Likely Case
Remote code execution leading to device takeover, network reconnaissance, and potential lateral movement within the network.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit details have been publicly disclosed on GitHub. The vulnerability requires authentication to the web interface, but default credentials or credential reuse could facilitate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check D-Link support site for firmware updates. 2. Download appropriate firmware for your model. 3. Access router web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the web management interface
Access router web interface > Advanced > Remote Management > Disable
Change default credentials
allUse strong, unique passwords for router administration
Access router web interface > Management > Account > Change password
🧯 If You Can't Patch
- Isolate affected routers in a separate VLAN with strict firewall rules
- Implement network monitoring for suspicious traffic to/from router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface: Login > Status > Firmware Information. If version is 1.1.5, device is vulnerable.Check Version:
curl -k https://[router-ip]/status.cgi (requires authentication)Verify Fix Applied:
Verify firmware version has been updated to a version later than 1.1.5📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /boafrm/formDebugDiagnosticRun
- Multiple failed login attempts followed by successful authentication
Network Indicators:
- Unexpected outbound connections from router
- Suspicious commands in HTTP POST parameters
SIEM Query:
source="router-logs" AND (uri="/boafrm/formDebugDiagnosticRun" OR command="ping" OR command="wget" OR command="curl")