Home/CVE/Integer Underflow vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior, Mitsubishi Electric MELSOFT
CVE

CVE-2021-20607

Integer Underflow vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior, Mitsubishi Electric MELSOFT

Integer Underflow vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior, Mitsubishi Electric MELSOFT Navigator versions 2.84N and prior and Mitsubishi Electric EZSocket versions 5.4 and prior allows an attacker to cause a DoS condition in the software by getting a user to open malicious project file specially crafted by an attacker.

MEDIUM · CVSS 5.5 EPSS 0.00151
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-191Integer Underflow (Wrap or Wraparound)
▤

Affected Products & Versions

3
mitsubishielectric ezsocket<= 5.4
mitsubishielectric gx works2<= 1.606g
mitsubishielectric melsoft navigatorall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD17 Dec 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-350-05
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://jvn.jp/vu/JVNVU93817405/index.htmlPatchThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-350-05Third Party AdvisoryUS Government Resource
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-021_en.pdfPatchVendor Advisory
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