CVE record · CVE-2025-8531

Mitsubishi Electric Corporation MELSEC-Q Series Q03UDVCPU: Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric…

CVSS 6.8 MediumEPSS 0.011 · 65th percentile

Published by the CVE Program (CNA: Mitsubishi) at 19 Sept 2025, 09:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Mitsubishi Electric Corporation	MELSEC-Q Series Q03UDVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q04UDVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q06UDVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q13UDVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q26UDVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q04UDPVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q06UDPVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q13UDPVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC-Q Series Q26UDPVCPU	affected The first 5 digits of serial No. "24082" to "27081" Other versions: unaffected

Identifiers: CVE-2025-8531
CNA: Mitsubishi
Weakness (CWE): CWE-130
Tags: Mitsubishi Electric Corporation MELSEC-Q Series Q03UDVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q04UDVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q06UDVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q13UDVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q26UDVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q04UDPVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q06UDPVCPU
Mitsubishi Electric Corporation MELSEC-Q Series Q13UDPVCPU
CWE-130
Published: 19 Sept 2025
Updated: 24 Sept 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.8	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H	CNA (Mitsubishi)

CISA KEV Not listed.
EPSS 0.011, the 65th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 19 Sept 2025. New records show when each source confirmed them.

Sources

References from the CNA

www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-013_en.pdf vendor-advisory
jvn.jp/vu/JVNVU97846038/ government-resource
www.cisa.gov/news-events/ics-advisories/icsa-25-266-02 government-resource

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.