CVE-2025-61330
📋 TL;DR
A hard-coded weak password vulnerability in H3C Magic-branded devices allows attackers to gain root access via Telnet. This affects all Magic-branded network equipment from H3C, particularly when Telnet is enabled or devices are exposed to public networks through Virtual Servers.
💻 Affected Systems
- All H3C Magic-branded network devices
⚠️ 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
Attackers gain complete control of devices, enabling network compromise, data interception, or use as attack platforms.
Likely Case
Unauthorized root access leading to device configuration changes, network disruption, or credential theft.
If Mitigated
Limited impact if Telnet is disabled and devices are not internet-facing.
🎯 Exploit Status
Exploitation requires Telnet access and knowledge of hard-coded credentials, but no authentication bypass is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for specific firmware updates
Vendor Advisory: https://www.h3c.com/en/Support/
Restart Required: No
Instructions:
1. Check H3C support for firmware updates. 2. Download and apply the latest firmware. 3. Verify root password is changed or removed.
🔧 Temporary Workarounds
Disable Telnet Service
allPrevent Telnet access to block exploitation vector.
telnet disable
Change Root Password
allManually set a strong root password in /etc/shadow.
passwd root
🧯 If You Can't Patch
- Disable Telnet service immediately and use SSH with strong authentication.
- Remove Virtual Server mappings to prevent internet exposure.
🔍 How to Verify
Check if Vulnerable:
Attempt Telnet login with common weak passwords or check /etc/shadow for hard-coded credentials.Check Version:
show versionVerify Fix Applied:
Confirm Telnet is disabled and root password is changed or strong.📡 Detection & Monitoring
Log Indicators:
- Failed/successful Telnet login attempts, especially for root account.
Network Indicators:
- Telnet connections to device IPs, unusual outbound traffic from devices.
SIEM Query:
source="telnet" AND (user="root" OR auth_failure)