CVE-2025-3511
📋 TL;DR
A remote unauthenticated attacker can send specially crafted UDP packets to cause a Denial of Service condition in affected Mitsubishi Electric industrial control system modules. This vulnerability affects multiple CC-Link IE TSN and Ethernet modules used in industrial automation environments. Organizations using these products in critical infrastructure or manufacturing operations are at risk.
💻 Affected Systems
- CC-Link IE TSN Remote I/O module
- CC-Link IE TSN Analog-Digital Converter module
- CC-Link IE TSN Digital-Analog Converter module
- CC-Link IE TSN FPGA module
- CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY
- MELSEC iQ-R Series CC-Link IE TSN Master/Local Module
- MELSEC iQ-R Series Ethernet Interface Module
- CC-Link IE TSN Master/Local Station Communication LSI CP610
- MELSEC iQ-F Series FX5 CC-Link IE TSN Master/Local Module
- MELSEC iQ-F Series FX5 Ethernet Module
- MELSEC iQ-F Series FX5-ENET/IP Ethernet Module
⚠️ 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 disruption of industrial processes, production downtime, safety system impairment, and potential physical damage if control systems become unresponsive.
Likely Case
Temporary loss of communication with affected modules causing production interruptions, requiring manual intervention and system restarts.
If Mitigated
Limited impact with proper network segmentation and monitoring, allowing quick detection and isolation of affected systems.
🎯 Exploit Status
Exploitation requires sending specially crafted UDP packets to vulnerable systems. No authentication required. Technical details are available in public advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Mitsubishi Electric advisory 2025-001 for specific firmware versions
Vendor Advisory: https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-001_en.pdf
Restart Required: Yes
Instructions:
1. Review Mitsubishi Electric advisory 2025-001. 2. Identify affected modules in your environment. 3. Download appropriate firmware updates from Mitsubishi Electric support portal. 4. Apply firmware updates following vendor instructions. 5. Restart affected modules. 6. Verify functionality post-update.
🔧 Temporary Workarounds
Network Segmentation and Firewall Rules
allRestrict UDP traffic to affected modules using network segmentation and firewall rules
# Example firewall rule to block UDP traffic to vulnerable ports
# iptables -A INPUT -p udp --dport [PORT_RANGE] -j DROP
# Replace [PORT_RANGE] with actual ports used by affected modules
VLAN Isolation
allPlace affected industrial control systems on isolated VLANs with strict access controls
# Configure VLAN isolation on network switches
# Example: switchport access vlan [VLAN_ID]
# Example: switchport mode access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems from untrusted networks
- Deploy intrusion detection systems to monitor for UDP-based attack patterns and anomalous traffic
🔍 How to Verify
Check if Vulnerable:
Check module firmware versions against Mitsubishi Electric advisory 2025-001. Systems running versions prior to patched releases are vulnerable.Check Version:
Use Mitsubishi Electric engineering tools (GX Works3, MELSOFT) to check module firmware versions. Command varies by specific module type.Verify Fix Applied:
Verify firmware version has been updated to patched version specified in vendor advisory. Test module functionality under normal operating conditions.📡 Detection & Monitoring
Log Indicators:
- Unexpected module restarts
- Communication errors in industrial control system logs
- Increased UDP traffic to industrial control modules
Network Indicators:
- Unusual UDP packet patterns to industrial control ports
- High volume of malformed UDP packets
- Traffic from unexpected sources to industrial control systems
SIEM Query:
source:industrial_control AND (event_type:module_restart OR protocol:udp AND packet_size:[SUSPICIOUS_RANGE])