CVE-2025-59484
📋 TL;DR
This CVE describes an insecure RSA implementation in Click Plus PLC firmware version 3.60, allowing attackers to potentially decrypt sensitive data or forge communications. Industrial control systems using this vulnerable firmware are affected, particularly in manufacturing and critical infrastructure environments.
💻 Affected Systems
- Click Plus PLC
⚠️ 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 compromise of PLC communications leading to unauthorized control of industrial processes, production disruption, or safety system manipulation
Likely Case
Interception and decryption of sensitive operational data, potential for man-in-the-middle attacks on PLC communications
If Mitigated
Limited impact if network segmentation and encryption controls prevent access to vulnerable systems
🎯 Exploit Status
Exploitation requires cryptographic analysis capabilities but no authentication to the PLC
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for updated firmware
Vendor Advisory: https://www.automationdirect.com/support/software-downloads
Restart Required: Yes
Instructions:
1. Download updated firmware from vendor site 2. Backup current configuration 3. Apply firmware update via programming software 4. Restart PLC 5. Verify firmware version
🔧 Temporary Workarounds
Network Segmentation
allIsolate PLCs in dedicated industrial network segments with strict firewall rules
Encryption Layer
allImplement additional encryption (IPsec/VPN) for PLC communications
🧯 If You Can't Patch
- Implement strict network access controls to limit communication to authorized systems only
- Monitor network traffic for unusual patterns or cryptographic attacks against PLC communications
🔍 How to Verify
Check if Vulnerable:
Check PLC firmware version via programming software or web interfaceCheck Version:
Use Click programming software to read PLC firmware versionVerify Fix Applied:
Confirm firmware version is updated beyond 3.60 and test RSA implementation📡 Detection & Monitoring
Log Indicators:
- Unusual network traffic patterns to PLC ports
- Multiple failed cryptographic operations
Network Indicators:
- Unusual traffic to PLC communication ports (typically 502/TCP for Modbus)
- Patterns consistent with cryptographic attacks
SIEM Query:
source_ip=* dest_ip=PLC_IP port=502 AND (event_type="crypto_failure" OR packet_size>threshold)