Summary
Successful exploitation of this vulnerability could allow a remote attacker to cause an out-of-bounds read, resulting in a denial-of-service condition in the affected products.
The following versions of Mitsubishi Electric CNC Series are affected:
- M800VW (BND-2051W000) <=BB
- M800VS (BND-2052W000) <=BB
- M80V (BND-2053W000) <=BB
- M80VW (BND-2054W000) <=BB
- M800W (BND-2005W000) <=FM
- M800S (BND-2006W000) <=FM
- M80 (BND-2007W000) <=FM
- M80W (BND-2008W000) <=FM
- E80 (BND-2009W000) <=FM
- C80 (BND-2036W000) vers:all/*
- M750VW (BND-1015W002) vers:all/*
- M730VW (BND-1015W000) vers:all/*
- M720VW (BND-1015W000) vers:all/*
- M750VS (BND-1012W002) vers:all/*
- M730VS (BND-1012W000-**) vers:all/*
- M720VS (BND-1012W000) vers:all/*
- M70V (BND-1018W000) vers:all/*
- E70 (BND-1022W000) vers:all/*
- NC Trainer2 (BND-1802W000) vers:all/*
- NC Trainer2 plus (BND-1803W000) vers:all/*
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 5.9 | Mitsubishi Electric | Mitsubishi Electric CNC Series | Improper Validation of Specified Index, Position, or Offset in Input |
Background
- Critical Infrastructure Sectors: Critical Manufacturing
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Japan
Vulnerabilities
CVE-2025-2399
Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) vulnerability in the affected products allows a remote attacker to cause an out-of-bounds read, resulting in a denial-of-service condition in the affected products by sending specially crafted packets to TCP port 683.
Affected Products
Mitsubishi Electric CNC Series
Mitsubishi Electric
Mitsubishi Electric M800VW (BND-2051W000): <=BB, Mitsubishi Electric M800VS (BND-2052W000): <=BB, Mitsubishi Electric M80V (BND-2053W000): <=BB, Mitsubishi Electric M80VW (BND-2054W000): <=BB, Mitsubishi Electric M800W (BND-2005W000): <=FM, Mitsubishi Electric M800S (BND-2006W000): <=FM, Mitsubishi Electric M80 (BND-2007W000): <=FM, Mitsubishi Electric M80W (BND-2008W000): <=FM, Mitsubishi Electric E80 (BND-2009W000): <=FM, Mitsubishi Electric C80 (BND-2036W000): vers:all/*, Mitsubishi Electric M750VW (BND-1015W002): vers:all/*, Mitsubishi Electric M730VW (BND-1015W000): vers:all/*, Mitsubishi Electric M720VW (BND-1015W000): vers:all/*, Mitsubishi Electric M750VS (BND-1012W002): vers:all/*, Mitsubishi Electric M730VS (BND-1012W000): vers:all/*, Mitsubishi Electric M720VS (BND-1012W000): vers:all/*, Mitsubishi Electric M70V (BND-1018W000): vers:all/*, Mitsubishi Electric E70 (BND-1022W000): vers:all/*, Mitsubishi Electric NC Trainer2 (BND-1802W000): vers:all/*, Mitsubishi Electric NC Trainer2 plus (BND-1803W000): vers:all/*
known_affected
Remediations
Vendor fix
Please apply the fixed version (BC or later) for Mitsubishi Electric M800VW(BND-2051W000), M800VS(BND-2052W000), M80V(BND-2053W000), and M80VW(BND-2054W000). For instructions on how to apply it, please consult your Mitsubishi Electric representative.
Vendor fix
Please apply the fixed version (FN or later) for Mitsubishi Electric M800W(BND-2005W000), M800S(BND-2006W000), M80(BND-2007W000), M80W(BND-2008W000), and E80(BND-2009W000). For instructions on how to apply it, please consult your Mitsubishi Electric representative.
Mitigation
For customers of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends using a firewall or virtual private network (VPN) to prevent unauthorized access, when internet access is required, to minimize the risk of exploiting this vulnerability.
Mitigation
For customers of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends using the product within a LAN and blocking access from untrusted networks and hosts through a firewall, to minimize the risk of exploiting this vulnerability.
Mitigation
For customers of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends using IP filters to prevent unauthorized access, when internet access is required, to minimize the risk of exploiting this vulnerability. IP filter function is available for M800V/M80V Series and M800/M80/E80 Series. For details about the IP filter function, refer to the following manual for each product: M800V/M80V Series Instruction Manual “16. Appendix 3 IP Address Filter Setting Function”, M800/M80/E80 Series Instruction Manual “15. Appendix 2 IP Address Filter Setting Function”
Mitigation
For customers of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends restricting physical access to the affected product and to all computers and network devices to which the products are connected, to minimize the risk of exploiting this vulnerability.
Mitigation
For customers of products that do not have a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends installing anti-virus software on PCs that can access the affected product, to minimize the risk of exploiting this vulnerability.
Mitigation
For more information, see Mitsubishi Electric 2025-022. https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-022_en.pdf
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-022_en.pdf
Relevant CWE: CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Acknowledgments
- Mitsubishi Electric reported this vulnerability to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.
Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.
Locate control system networks and remote devices behind firewalls and isolate them from business networks.
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
Advisory Conversion Disclaimer
This ICSA is a verbatim republication of CISA V20250121-001#02 from a direct conversion of the vendor’s Common Security Advisory Framework (CSAF) advisory. This is republished to CISA’s website as a means of increasing visibility and is provided “as-is” for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact CISA directly for any questions regarding this advisory.
Revision History
- Initial Release Date: 2026-03-10
| Date | Revision | Summary |
|---|---|---|
| 2026-03-10 | 1 | Initial Publication |
| 2026-03-19 | 2 | Initial CISA Republication of Mitsubishi Electric V20250121-001#02 advisory |
