CVE-2025-54857
📋 TL;DR
This vulnerability allows remote unauthenticated attackers to execute arbitrary operating system commands with root privileges on SkyBridge BASIC MB-A130 devices. It affects version 1.5.8 and earlier due to improper input sanitization in OS command execution. Organizations using these devices in vulnerable configurations are at risk of complete system compromise.
💻 Affected Systems
- SkyBridge BASIC MB-A130
⚠️ 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 system takeover with root privileges, enabling data theft, ransomware deployment, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution leading to device compromise, network reconnaissance, and potential pivot to internal networks.
If Mitigated
Limited impact if devices are behind firewalls with strict network segmentation and command execution restrictions.
🎯 Exploit Status
OS command injection vulnerabilities typically have low exploitation complexity once the injection point is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.5.9 or later
Vendor Advisory: https://www.seiko-sol.co.jp/archives/90289/
Restart Required: Yes
Instructions:
1. Download firmware update from vendor website. 2. Backup device configuration. 3. Upload firmware via web interface. 4. Apply update and restart device. 5. Verify version is 1.5.9 or higher.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SkyBridge devices in separate VLAN with strict firewall rules limiting inbound connections.
Input Validation at Proxy
allDeploy WAF or reverse proxy to filter malicious input patterns before reaching the device.
🧯 If You Can't Patch
- Immediately remove device from internet-facing networks and place behind strict firewall with minimal allowed connections.
- Implement network monitoring and intrusion detection specifically for command injection patterns targeting this device.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH. If version is 1.5.8 or earlier, device is vulnerable.Check Version:
ssh admin@device_ip 'cat /etc/version' or check web interface System Information pageVerify Fix Applied:
Confirm firmware version is 1.5.9 or later in device administration interface.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful command execution
- Suspicious process creation from web service user
Network Indicators:
- Unusual outbound connections from device
- Traffic patterns indicating reverse shells
- Command injection patterns in HTTP requests
SIEM Query:
source="skybridge_logs" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")