CVE-2023-4562

Information Disclosure, Information Tampering and Authentication Bypass Vulnerability in MELSEC-F Series main module

9.1 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

1.21%Up 1.2 points since Oct 13, 2023

What each source reports

CVE List Score used 9.1

Information Disclosure, Information Tampering and Authentication Bypass Vulnerability in MELSEC-F Series main module

Record: CVE-2023-4562
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-287
Updated: 2026-11-02

EUVDEUVD-2023-54417 9.1

Record: EUVD-2023-54417
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3728-9cr9-4xwr 9.1

Improper Authentication vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main...

Record: GHSA-3728-9cr9-4xwr
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-287
Updated: 2026-11-02

NVD 9.1

Record: CVE-2023-4562
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-287
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-4562 is a critical vulnerability (CVSS 9.1) in Mitsubishi Electric Corporation Melsec-f Series Fx3g-14mr/ds, published October 13, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.21%, the 68th percentile. No source names a fixed version.