HOMEVULNERABILITIESCVE-2023-4699
CRITICAL

CVE-2023-4699

CWE-306Published: November 6, 2023· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official Description

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation MELSEC-F Series CPU modules, MELSEC iQ-F Series, MELSEC iQ-R series CPU modules, MELSEC iQ-R series, MELSEC iQ-L series, MELSEC Q series, MELSEC-L series, Mitsubishi Electric CNC M800V/M80V series, Mitsubishi Electric CNC M800/M80/E80 series and Mitsubishi Electric CNC M700V/M70V/E70 series allows a remote unauthenticated attacker to execute arbitrary commands by sending specific packets to the affected products. This could lead to disclose or tamper with information by reading or writing control programs, or cause a denial-of-service (DoS) condition on the products by resetting the memory contents of the products to factory settings or resetting the products remotely.

NVD Source

Technical Analysis

CVE-2023-4699 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected Vendors & Products

mitsubishielectric432 product(s)
fx3u-32mt\/es firmwarefx3u-32mt\/esfx3u-48mt\/es firmwarefx3u-48mt\/esfx3u-64mt\/es firmwarefx3u-64mt\/esfx3u-80mt\/es firmwarefx3u-80mt\/esfx3u-128mt\/e firmwarefx3u-128mt\/efx3u-16mt\/es firmwarefx3u-16mt\/es+420
Source: NVD CPE · 432 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://jvn.jp/vu/JVNVU94620134/
ADVISORYhttps://www.cisa.gov/news-events/ics-advisories/icsa-23-306-03
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-013_en.pdf
ADVISORYhttps://jvn.jp/vu/JVNVU94620134/
ADVISORYhttps://www.cisa.gov/news-events/ics-advisories/icsa-23-306-03
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-013_en.pdf

All References (6)

→
https://jvn.jp/vu/JVNVU94620134/Third Party Advisory
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-306-03Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-013_en.pdfVendor Advisory
→
https://jvn.jp/vu/JVNVU94620134/Third Party Advisory
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-306-03Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-013_en.pdfVendor Advisory

Quick Facts

CVE IDCVE-2023-4699
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-306
CISA KEVNo
Affected1 vendor(s)
PublishedNov 6, 2023

Related CVEs (CWE-306)

CVE-2025-36535
10.0
CVE-2026-46778
10.0
CVE-2026-62422
10.0
CVE-2014-9195
10.0
CVE-2026-34162
10.0
CVE-2026-46781
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-4699 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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