CVE-2025-8890
📋 TL;DR
CVE-2025-8890 is a shell command injection vulnerability in the network diagnostics tool of SDMC NE6037 routers. Attackers with administrative access can execute arbitrary commands on the router. Only users of affected router firmware versions are impacted.
💻 Affected Systems
- SDMC NE6037 routers
⚠️ 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 router compromise allowing attacker to intercept all network traffic, install persistent backdoors, pivot to internal network devices, or brick the router.
Likely Case
Attacker with LAN access gains administrative credentials (via default or weak passwords) and executes commands to monitor traffic, steal credentials, or disrupt network services.
If Mitigated
With strong administrative passwords and network segmentation, impact is limited to the router itself without lateral movement.
🎯 Exploit Status
Exploitation requires administrative credentials. No public exploit code has been released.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.1.12.2.44
Vendor Advisory: https://cert.pl/en/posts/2025/11/CVE-2025-8890
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to firmware update section. 3. Upload firmware version 7.1.12.2.44 or later. 4. Apply update and restart router.
🔧 Temporary Workarounds
Disable network diagnostics tool
allTemporarily disable the vulnerable network diagnostics feature if available in admin interface.
Restrict admin interface access
allConfigure firewall rules to restrict access to router admin interface to specific trusted IP addresses only.
🧯 If You Can't Patch
- Change default administrative credentials to strong, unique passwords.
- Segment the network to isolate the router from critical systems and implement strict access controls.
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is below 7.1.12.2.44, the device is vulnerable.Check Version:
Login to router admin portal and check System Status or Firmware Information page.Verify Fix Applied:
After updating, verify firmware version shows 7.1.12.2.44 or higher in admin interface.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in router logs
- Multiple failed login attempts followed by successful admin login
- Unexpected firmware or configuration changes
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains from router
- Unexpected network traffic patterns
SIEM Query:
source="router_logs" AND (event="command_injection" OR event="shell_execution")