CVE-2025-11787
📋 TL;DR
This CVE describes a command injection vulnerability in Circutor SGE-PLC1000/SGE-PLC50 devices that allows attackers to execute arbitrary commands on the operating system. The vulnerability exists in the 'GetDNS()', 'CheckPing()' and 'TraceRoute()' functions. Organizations using affected versions of these industrial control system devices are at risk.
💻 Affected Systems
- Circutor SGE-PLC1000
- Circutor SGE-PLC50
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands, potentially gaining persistent access, disrupting industrial processes, or using the device as a pivot point into operational technology networks.
Likely Case
Remote code execution leading to device compromise, data exfiltration, or disruption of monitoring/control functions in industrial environments.
If Mitigated
Limited impact if devices are properly segmented, have restricted network access, and command injection attempts are blocked by security controls.
🎯 Exploit Status
Command injection vulnerabilities typically have low exploitation complexity. The advisory suggests unauthenticated exploitation is possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with Circutor for specific patched versions
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-circutor-products-0
Restart Required: Yes
Instructions:
1. Contact Circutor for firmware updates. 2. Download the latest firmware version. 3. Follow vendor instructions to update device firmware. 4. Verify the update was successful. 5. Restart the device as required.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and restrict access to necessary management interfaces only.
Input Validation at Network Perimeter
allDeploy web application firewalls or network filters to block command injection patterns targeting the vulnerable functions.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from untrusted networks
- Deploy intrusion detection/prevention systems to monitor for command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If running v9.0.2 or later unspecified vulnerable versions, the device is vulnerable.Check Version:
Check via device web interface or consult device documentation for version checking commandsVerify Fix Applied:
Verify firmware version has been updated to a version after the vulnerability was addressed. Check with Circutor for specific patched version numbers.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Multiple failed attempts to access diagnostic functions
- Unexpected system process creation
Network Indicators:
- Unusual traffic to device diagnostic endpoints
- Suspicious payloads containing shell metacharacters in requests to GetDNS, CheckPing, or TraceRoute functions
SIEM Query:
Example: 'source="circutor-device" AND (uri="*GetDNS*" OR uri="*CheckPing*" OR uri="*TraceRoute*") AND payload CONTAINS ["|", ";", "`", "$"]'