CVE-2026-2081
📋 TL;DR
This CVE describes an OS command injection vulnerability in D-Link DIR-823X routers via the /goform/set_password endpoint. Attackers can remotely execute arbitrary commands by manipulating the http_passwd parameter. All users of affected D-Link DIR-823X routers with firmware version 250416 are vulnerable.
💻 Affected Systems
- D-Link DIR-823X
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, intercept network traffic, pivot to internal networks, or brick the device.
Likely Case
Attackers gain unauthorized access to router configuration, modify network settings, intercept traffic, or use the device as a foothold for further attacks.
If Mitigated
Limited impact with proper network segmentation and access controls preventing lateral movement from compromised router.
🎯 Exploit Status
Public exploit details available on GitHub and VulDB, making exploitation straightforward for attackers.
🛠️ 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 latest firmware if available
3. Upload firmware via router admin interface
4. Reboot router after update
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected routers with supported models
- Implement strict firewall rules blocking access to port 80/443 from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is 250416, device is vulnerable.Check Version:
Check via router web interface at http://[router-ip]/ or using curl: curl -s http://[router-ip]/Verify Fix Applied:
Verify firmware version has been updated to a version newer than 250416.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/set_password
- Suspicious command execution in system logs
- Multiple failed login attempts
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs
- Port scanning originating from router
SIEM Query:
source="router-logs" AND (uri="/goform/set_password" OR command="*sh*" OR process="*bin*sh*")