CVE-2022-50596
📋 TL;DR
CVE-2022-50596 is a critical command injection vulnerability in D-Link DIR-1260 routers that allows unauthenticated attackers to execute arbitrary commands with root privileges. The flaw exists in the web management interface's GetDeviceSettings form and affects all users with vulnerable firmware versions. Attackers can exploit this over local networks or potentially from the internet if remote management is enabled.
💻 Affected Systems
- D-Link DIR-1260 Wi-Fi Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover allowing installation of persistent malware, network traffic interception, credential theft, and use as a pivot point to attack other internal systems.
Likely Case
Router compromise leading to DNS hijacking, credential harvesting, botnet enrollment, and disruption of network services.
If Mitigated
Limited impact if remote management is disabled and network segmentation prevents lateral movement from compromised devices.
🎯 Exploit Status
Public exploit code exists and requires minimal technical skill to execute. The vulnerability is in a web form parameter that accepts unsanitized input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version after v1.20B05 (check vendor advisory for specific version)
Vendor Advisory: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10298
Restart Required: Yes
Instructions:
1. Log into router web interface. 2. Navigate to System > Firmware Update. 3. Download latest firmware from D-Link support site. 4. Upload and apply firmware update. 5. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevents internet-based exploitation by disabling remote access to the web interface
Network Segmentation
allIsolate router management interface to separate VLAN or restrict access to trusted IPs
🧯 If You Can't Patch
- Replace the router with a different model that receives security updates
- Place router behind a firewall that blocks all inbound traffic to its management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System > Firmware Information. If version is v1.20B05 or earlier, device is vulnerable.Check Version:
No CLI command available. Must use web interface: System > Firmware InformationVerify Fix Applied:
After updating, verify firmware version is newer than v1.20B05. Test by attempting to access the GetDeviceSettings form with malicious payloads (in controlled environment).📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /GetDeviceSettings with shell metacharacters in parameters
- Multiple failed login attempts followed by successful GetDeviceSettings access
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- DNS queries to suspicious domains from router itself
SIEM Query:
source="router_logs" AND (uri_path="/GetDeviceSettings" AND (param="SetDest" OR param="Dest" OR param="Target") AND param_value MATCHES "[;|&`$()]+")🔗 References
- https://blog.exodusintel.com/2022/05/11/d-link-dir-1260-getdevicesettings-pre-auth-command-injection-vulnerability/
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10298
- https://www.vulncheck.com/advisories/dlink-dir1260-getdevicesettings-unauthenticated-command-injection
