HOMEVULNERABILITIESCVE-2022-40265
HIGH

CVE-2022-40265

CWE-20Published: November 30, 2022· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Improper Input Validation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series RJ71EN71 Firmware version "65" and prior and Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120ENCPU Network Part Firmware version "65" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition by sending specially crafted packets. A system reset is required for recovery.

NVD Source

Technical Analysis

CVE-2022-40265 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 availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

mitsubishielectric12 product(s)
rj71en71 firmwarerj71en71r04encpu firmwarer04encpur08encpu firmwarer08encpur16encpu firmwarer16encpur32encpu firmwarer32encpur120encpu firmwarer120encpu
Source: NVD CPE · 12 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/JVNVU94702422
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdf
ADVISORYhttps://jvn.jp/vu/JVNVU94702422
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdf

All References (4)

→
https://jvn.jp/vu/JVNVU94702422Third Party Advisory
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdfVendor Advisory
→
https://jvn.jp/vu/JVNVU94702422Third Party Advisory
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdfVendor Advisory

Quick Facts

CVE IDCVE-2022-40265
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedNov 30, 2022

Related CVEs (CWE-20)

CVE-2003-1425
10.0
CVE-2008-1331
10.0
CVE-2007-6494
10.0
CVE-2024-22476
10.0
CVE-2008-6826
10.0
CVE-2007-6176
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-40265 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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