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No exploitation reportedFix available

CVE-2023-3373

No exploitation reported by the sources we read.

  • Published2023-08-04
  • Fixed in01.50.000
  • WeaknessCWE-330 · CWE-342

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-08-0400:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-3373?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-3373?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Mitsubishielectric gs21 firmwareversion to verify
BranchAffectedFixed in
1.50< 01.50.00001.50.000
Mitsubishielectric gt21 firmwareversion to verify
BranchAffectedFixed in
1.50< 01.50.00001.50.000

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-23-215-01 CISA2 known affected

    Mitsubishi Electric GOT2000 and GOT SIMPLE

    GOT2000 Series, GT21 model: <= 01.49.000 · GOT SIMPLE, GS21 model: <= 01.49.000

Full record on NVD

Fix

  1. Update Mitsubishielectric gs21 firmware to 01.50.000
  2. Vendor fix CISA ICSA-23-215-01 · 1 productGOT2000 Series, GT21 model version 01.50.000 or later
  3. Vendor fix CISA ICSA-23-215-01 · 1 productGOT SIMPLE, GS21 model version 01.50.000 or later
  4. Mitigation from the vendor CISA ICSA-23-215-01 · 2 productsMitsubishi Electric has created the following versions to fix this issue:
  5. Mitigation from the vendor CISA ICSA-23-215-01 · 2 productsMitsubishi Electric recommends the following steps to update:
  6. Mitigation from the vendor CISA ICSA-23-215-01 · 2 productsPlease contact your local Mitsubishi Electric representative to download the fixed version of GT Designer3 Version1 (GOT2000) and install on a personal computer.
  7. Mitigation from the vendor CISA ICSA-23-215-01 · 2 productsStart the GT Designer3 Version1 (GOT2000) and open the project data used in affected products.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-02-26
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.15.9read 2026-10-23
  • NVDCVSS 3.19.1read 2026-10-23
  • CNAweakness (CWE)CWE-342read 2026-10-23
  • NVDweakness (CWE)CWE-330read 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
2023-08-04
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-3373?

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.

Is CVE-2023-3373 actively exploited?

Active exploitation of CVE-2023-3373 has not been confirmed. Its EPSS score was 1.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-3373?

CVE-2023-3373 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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