No exploitation reported

CVE-2023-4562

No exploitation reported by the sources we read.

Published2023-10-13
WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Improper Authentication vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main modules allows a remote unauthenticated attacker to obtain sequence programs from the product or write malicious sequence programs or improper data in the product without authentication by sending illegitimate messages.

Timeline

dates in UTC

2023-10-1302:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-4562?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-4562?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Mitsubishielectric fx3g-14 mr\/ds firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishielectric fx3g-14 mr\/es firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishielectric fx3g-14 mt\/ds firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

187 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-23-285-13 CISA16 known affected
Mitsubishi Electric MELSEC-F Series
MELSEC-F series FX3U-xMy/z x=16,32,48,64,80,128, y=T,R, z=ES,ESS,DS,DSS: vers:all/* · MELSEC-F series FX3U-32MR/UA1, FX3U-64MR/UA1: vers:all/* · MELSEC-F FX3U-32MS/ES, FX3U-64MS/ES: vers:all/* · +13 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-23-285-13 · 16 productsMitsubishi Electric recommends that customers take the following mitigation measures to minimize the risk of exploiting this vulnerability:
Mitigation from the vendor CISA ICSA-23-285-13 · 16 productsUse a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.
Mitigation from the vendor CISA ICSA-23-285-13 · 16 productsUse within a LAN and block access from untrusted networks and hosts through firewalls.
Mitigation from the vendor CISA ICSA-23-285-13 · 16 productsRestrict physical access to the affected products and the LAN that is connected by them.
Mitigation from the vendor CISA ICSA-23-285-13 · 16 productsFor specific update instructions and additional details see the Mitsubishi Electric advisory.

Advisories and patches

www.mitsubishielectric.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-02-26
OpenCVESSVC decisionnone—
CNACVSS 3.19.1read 2026-10-23
NVDCVSS 3.19.1read 2026-10-23
CNAweakness (CWE)CWE-287read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2023-10-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-4562?

Is CVE-2023-4562 actively exploited?

Active exploitation of CVE-2023-4562 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-4562?

CVE-2023-4562 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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