CVE record · CVE-2023-1424

Denial-of-Service and Remote Code Execution Vulnerability in MELSEC Series CPU module

CVSS 10.0 CriticalCriticalEPSS 0.034 · 89th percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the CVE Program (CNA: Mitsubishi) at 24 May 2023, 04:39 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 iQ-F Series FX5U-32MT/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MT/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MT/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-32MR/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MR/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MR/ES	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-32MT/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MT/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MT/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-32MR/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MR/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MR/DS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-32MT/ESS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MT/ESS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MT/ESS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-32MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-64MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5U-80MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-32MT/D	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-64MT/D	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-96MT/D	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-32MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-64MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-96MT/DSS	affected Serial number 17X**** or later, versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-32MT/DS-TS	affected versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-32MT/DSS-TS	affected versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-F Series FX5UC-32MR/DS-TS	affected versions from 1.220 to 1.281 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R00CPU	affected versions 35 and prior Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R01CPU	affected versions 35 and prior Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R02CPU	affected versions 35 and prior Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R04CPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R08CPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R16CPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R32CPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R120CPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R04ENCPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R08ENCPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R16ENCPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R32ENCPU	affected versions from 12 to 68 Other versions: unaffected
Mitsubishi Electric Corporation	MELSEC iQ-R Series R120ENCPU	affected versions from 12 to 68 Other versions: unaffected

And 8 more products. The full list is on the CVE record.

Identifiers: CVE-2023-1424
CNA: Mitsubishi
Weakness (CWE): CWE-120
Tags: Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS
Memory corruption
Published: 24 May 2023
Updated: 5 Mar 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
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (Mitsubishi)

CISA KEV Not listed.
EPSS 0.034, the 89th percentile, on 6 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 24 May 2023. New records show when each source confirmed them.

Sources

References from the CNA

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.