CVE-2025-3542
📋 TL;DR
This critical vulnerability allows remote attackers to execute arbitrary commands on affected H3C Magic routers via command injection in the FCGI_WizardProtoProcess function. Attackers within the local network can exploit this to gain full control of the device. Affected products include H3C Magic NX15, NX400, and R3010 routers running vulnerable firmware versions.
💻 Affected Systems
- H3C Magic NX15
- H3C Magic NX400
- H3C Magic R3010
⚠️ 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 attacker to reconfigure network settings, intercept traffic, install persistent backdoors, or pivot to other internal systems.
Likely Case
Router takeover enabling network traffic interception, DNS manipulation, credential harvesting, and lateral movement within the local network.
If Mitigated
Limited impact if network segmentation isolates routers and strict access controls prevent unauthorized local network access.
🎯 Exploit Status
Exploit code has been publicly disclosed on GitHub, making exploitation straightforward for attackers with local network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after V100R014
Vendor Advisory: https://www.h3c.com/cn/Service/Document_Software/Software_Download/Consume_product/
Restart Required: Yes
Instructions:
1. Visit H3C support website. 2. Download latest firmware for your specific model. 3. Backup current configuration. 4. Upload and install new firmware via web interface. 5. Reboot router. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface to dedicated VLAN with strict access controls
Access Control Lists
allImplement firewall rules to restrict access to router web interface from trusted IPs only
🧯 If You Can't Patch
- Segment router management interface to isolated network segment with strict access controls
- Implement network monitoring for suspicious POST requests to /api/wizard/getsyncpppoecfg endpoint
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface under System Status or via SSH using 'show version' commandCheck Version:
ssh admin@router-ip 'show version' or check web interface System Status pageVerify Fix Applied:
Verify firmware version is newer than V100R014 and test that POST requests to vulnerable endpoint no longer execute injected commands📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /api/wizard/getsyncpppoecfg
- Command execution attempts in system logs
- Multiple failed authentication attempts followed by successful exploit
Network Indicators:
- Suspicious HTTP POST traffic to router management interface from unexpected internal IPs
- Outbound connections from router to unusual external IPs
SIEM Query:
source="router-logs" AND (uri="/api/wizard/getsyncpppoecfg" OR command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*)")