CVE-2023-2846

Authentication Bypass Vulnerability in MELSEC-F Series main module

7.5 High

Authentication Bypass by Capture-replay vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series main modules allows a remote unauthenticated attacker to cancel the password/keyword setting and login to the affected products by sending specially crafted packets.

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: None
Integrity: High
Availability: None

Exploit likelihood

1.32%Up 1.3 points since Jun 30, 2023

What each source reports

CVE List Score used 7.5

Authentication Bypass Vulnerability in MELSEC-F Series main module

Record: CVE-2023-2846
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-294
Updated: 2026-11-02

EUVDEUVD-2023-34297 7.5

Record: EUVD-2023-34297
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-f86h-3pcp-x4mw 7.5

Authentication Bypass by Capture-replay vulnerability in Mitsubishi Electric Corporation MELSEC...

Record: GHSA-f86h-3pcp-x4mw
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-294
Updated: 2026-11-02

NVD 7.5

Record: CVE-2023-2846
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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-294
Updated: 2026-11-02

Affected products

Show 288 moreShow less

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-2023-2846 is a high vulnerability (CVSS 7.5) in Mitsubishi Electric Corporation Melsec-f Series Fx3g-14mr/ds, published June 30, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.32%, the 71st percentile. No source names a fixed version.