CVE-2025-2731
📋 TL;DR
This critical vulnerability in H3C Magic routers allows authenticated attackers on the local network to execute arbitrary commands via command injection in the /api/wizard/getDualbandSync endpoint. Successful exploitation could lead to complete device compromise and network infiltration. Affected users include organizations and individuals using vulnerable H3C Magic router models.
💻 Affected Systems
- H3C Magic NX15
- H3C Magic NX30 Pro
- H3C Magic NX400
- H3C Magic R3010
- H3C Magic BE18000
⚠️ 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 takeover allowing attacker to intercept all network traffic, deploy malware to connected devices, pivot to other network segments, and establish persistent backdoor access.
Likely Case
Router configuration compromise leading to DNS hijacking, credential theft from network traffic, and installation of malicious firmware or scripts.
If Mitigated
Limited impact if network segmentation isolates routers and strict access controls prevent unauthorized local network access.
🎯 Exploit Status
Exploit details have been publicly disclosed on GitHub. Attack requires local network access and authentication to the router web interface. The vulnerability is in the HTTP POST handler for the /api/wizard/getDualbandSync endpoint.
🛠️ 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. Access router web interface. 2. Navigate to firmware update section. 3. Download latest firmware from H3C official website. 4. Upload and apply firmware update. 5. Reboot router after update completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface to separate VLAN with strict access controls
Access Control Restriction
allRestrict access to router web interface to specific trusted IP addresses only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate router management interfaces
- Deploy network monitoring and intrusion detection for suspicious POST requests to /api/wizard/getDualbandSync
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or SSH. If version is V100R014 or earlier, device is vulnerable.Check Version:
Check via router web interface: System Status > Firmware Version, or via SSH: show versionVerify Fix Applied:
Verify firmware version is newer than V100R014. Test that POST requests to /api/wizard/getDualbandSync with command injection payloads no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /api/wizard/getDualbandSync endpoint
- Suspicious command execution in router logs
- Multiple failed authentication attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains from router
- Unexpected network traffic patterns
SIEM Query:
source="router_logs" AND (uri="/api/wizard/getDualbandSync" OR command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*)")🔗 References
- https://github.com/Qwen11/CVE_store/blob/main/H3C/vulnerability%20Information_3.md
- https://vuldb.com/?ctiid.300751
- https://vuldb.com/?id.300751
- https://vuldb.com/?submit.520497
- https://www.h3c.com/cn/Service/Document_Software/Software_Download/Consume_product/
- https://zhiliao.h3c.com/theme/details/229784
- https://github.com/Qwen11/CVE_store/blob/main/H3C/vulnerability%20Information_3.md
