HOMEVULNERABILITIESCVE-2023-3373
CRITICAL

CVE-2023-3373

CWE-342Published: August 4, 2023· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official Description

Predictable Exact Value from Previous Values vulnerability in Mitsubishi Electric Corporation GOT2000 Series GT21 model versions 01.49.000 and prior and GOT SIMPLE Series GS21 model versions 01.49.000 and prior allows a remote unauthenticated attacker to hijack data connections (session hijacking) or prevent legitimate users from establishing data connections (to cause DoS condition) by guessing the listening port of the data connection on FTP server and connecting to it.

NVD Source

Technical Analysis

CVE-2023-3373 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

mitsubishielectric4 product(s)
gt21 firmwaregt21gs21 firmwaregs21
Source: NVD CPE · 4 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/JVNVU92167394/index.html
ADVISORYhttps://www.cisa.gov/news-events/ics-advisories/icsa-23-215-01
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-006_en.pdf
ADVISORYhttps://jvn.jp/vu/JVNVU92167394/index.html
ADVISORYhttps://www.cisa.gov/news-events/ics-advisories/icsa-23-215-01
ADVISORYhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-006_en.pdf

All References (6)

→
https://jvn.jp/vu/JVNVU92167394/index.htmlThird Party Advisory
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-215-01Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-006_en.pdfVendor Advisory
→
https://jvn.jp/vu/JVNVU92167394/index.htmlThird Party Advisory
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-215-01Third Party Advisory · US Government Resource
→
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-006_en.pdfVendor Advisory

Quick Facts

CVE IDCVE-2023-3373
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-342
CISA KEVNo
Affected1 vendor(s)
PublishedAug 4, 2023

Related CVEs (CWE-342)

CVE-2020-16226
9.8
CVE-2022-27577
9.1
CVE-2014-9196
7.6
CVE-2020-28388
5.3
CVE-2022-29930
4.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-3373 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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