Medium

CVE-2025-2399 — Denial of Service (DoS) Vulnerability in Mitsubishi Electric CNC Series

Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Mitsubishi Electric CNC M800V Series M800VW and M800VS, M80V Series M80V and M80VW, M800 Series M800W and M800S, M80 Series M80 and M80W, E80 Series E80, C80 Series C80, and M700V Series M750VW, M720VW, 730VW, M720VS, M730VS, and M750VS, M70V Series M70V, E70 Series E70 allows a remote attacker to cause an out-of-bounds read, resulting in a denial-of-service condition by sending specially crafted packets to TCP port 683.

Published Mar 10, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Mitsubishi

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.5% (30-day exploitation probability)+7
Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.53%

ahead of 44% of scored CVEs · Oct 14, 2026

Affects

Mitsubishi Electric Corporation

Mitsubishi Electric CNC C80 Series C80 and 17 more

CVSS base

5.9

Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Mitsubishi Electric Corporation Mitsubishi Electric CNC C80 Series C80, Mitsubishi Electric Corporation Mitsubishi Electric CNC E70 Series E70, Mitsubishi Electric Corporation Mitsubishi Electric CNC E80 Series E80…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Mitsubishi Electric Corporation	Mitsubishi Electric CNC C80 Series C80	version System Number BND-2036W000 all versions	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC E70 Series E70	version System Number BND-1022W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC E80 Series E80	version System Number BND-2009W000 versions FM and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M720VS	version System Number BND-1012W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M720VW	version System Number BND-1015W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M730VS	version System Number BND-1012W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M730VW	version System Number BND-1015W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M750VS	version System Number BND-1012W002 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M700V Series M750VW	version System Number BND-1015W002 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M70V Series M70V	version System Number BND-1018W000 versions LJ and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M80 Series M80	version System Number BND-2007W000 versions FM and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M80 Series M80W	version System Number BND-2008W000 versions FM and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M800 Series M800S	version System Number BND-2006W000 versions FM and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M800 Series M800W	version System Number BND-2005W000 versions FM and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M800V Series M800VS	version System Number BND-2052W000 versions BB and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M800V Series M800VW	version System Number BND-2051W000 versions BB and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M80V Series M80V	version System Number BND-2053W000 versions BB and prior	Vulnerable	CVE Program (cve.org) e CISA ADP
Mitsubishi Electric Corporation	Mitsubishi Electric CNC M80V Series M80VW	version System Number BND-2054W000 versions BB and prior	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.9	CVSS 3.1	Medium	2.2	3.6	Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp via NIST National Vulnerability Database
5.9	CVSS 3.1	Medium	—	—	Mitsubishi via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-1285

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.53%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · mitsubishi electric corporation/mitsubishi electric cnc m800v series m800vw, mitsubishi electric corporation/mitsubishi
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 5.9
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Awaiting Analysis
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Mar 10, 2026 · Mitsubishi

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

2 on the record

jvn.jp/vu/JVNVU95523788/
government-resource, NIST National Vulnerability Database
www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2025-022_en.pdf
vendor-advisory, NIST National Vulnerability Database

Elsewhere on this site

Mitsubishi Electric Corporation
every CVE for this vendor

CWE-1285
other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-2399 is "Denial of Service (DoS) Vulnerability in Mitsubishi Electric CNC Series", rated Medium. It affects Mitsubishi Electric CNC C80 Series C80 (Mitsubishi Electric Corporation); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.9 describes technical severity. EPSS 0.53% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.