CVE-2025-11097
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on D-Link DIR-823X routers by injecting malicious commands into the mac parameter of the /goform/set_device_name endpoint. Attackers can potentially take full control of affected devices. All users of D-Link DIR-823X routers with firmware version 250416 are affected.
💻 Affected Systems
- D-Link DIR-823X
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, intercept network traffic, pivot to internal networks, or join botnets.
Likely Case
Attackers gain shell access to modify device settings, steal credentials, or use the device as a foothold for further attacks.
If Mitigated
Limited impact if device is behind strict firewall rules with no external access to the web interface.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Attack requires access to the web interface but may not require authentication depending on device configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link website for latest firmware
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Visit D-Link support website. 2. Download latest firmware for DIR-823X. 3. Log into router web interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the web interface
Restrict Web Interface Access
allUse firewall rules to limit access to router management interface
🧯 If You Can't Patch
- Isolate affected routers in separate network segments
- Implement strict network access controls to prevent external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check if device is D-Link DIR-823X with firmware version 250416 via web interface or SSHCheck Version:
Check web interface at System Status or via SSH: cat /etc/versionVerify Fix Applied:
Verify firmware version is updated to latest version from D-Link📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/set_device_name with shell metacharacters in mac parameter
- Unexpected command execution in system logs
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs
SIEM Query:
source="router_logs" AND uri_path="/goform/set_device_name" AND (mac="*;*" OR mac="*|*" OR mac="*`*")