CVE-2025-60676
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary commands on D-Link DIR-878A1 routers by exploiting a command injection flaw in the SetNetworkSettings functionality. It affects users of the DIR-878A1 router with vulnerable firmware, potentially leading to full device compromise. Attackers can exploit it remotely without any authentication.
💻 Affected Systems
- D-Link DIR-878A1 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full router compromise, enabling attackers to steal credentials, redirect traffic, install persistent malware, or use the device as a botnet node.
Likely Case
Attackers gain shell access to modify router settings, intercept network traffic, or launch attacks on internal devices.
If Mitigated
If patched or isolated, impact is limited to denial-of-service or minor configuration changes without broader network access.
🎯 Exploit Status
Exploitation involves sending crafted HTTP requests to prog.cgi; public proof-of-concept code is available, making attacks straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Check D-Link's security bulletin for updates. 2. If a patch is released, download it from the official D-Link support site. 3. Log into the router's web interface. 4. Navigate to firmware update section. 5. Upload and apply the new firmware. 6. Restart the router as prompted.
🔧 Temporary Workarounds
Disable remote management
allPrevents external access to the router's web interface, reducing attack surface.
Log into router web interface, go to Advanced > Remote Management, disable it.
Block access to prog.cgi
linuxUse firewall rules to block HTTP requests to the vulnerable endpoint.
iptables -A INPUT -p tcp --dport 80 -m string --string 'prog.cgi' --algo bm -j DROP
🧯 If You Can't Patch
- Isolate the router on a separate network segment to limit potential damage.
- Implement network monitoring to detect and alert on suspicious HTTP requests to the router.
🔍 How to Verify
Check if Vulnerable:
Send a test HTTP POST request to http://<router_ip>/prog.cgi with crafted IPAddress parameter and observe response; if commands execute, it's vulnerable.Check Version:
Log into router web interface and check firmware version under Status or System Info.Verify Fix Applied:
After patching, repeat the test request; if no command execution occurs and firmware version matches patched release, fix is applied.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to prog.cgi with shell metacharacters in parameters.
- Log entries showing command execution errors or unexpected system calls.
Network Indicators:
- HTTP traffic to router on port 80 with payloads containing characters like ;, |, or $ in IPAddress/SubnetMask fields.
SIEM Query:
source="router_logs" AND url="*prog.cgi*" AND (param="*;*" OR param="*|*" OR param="*$*" )