CVE-2021-20607

low-risk
Published 2021-12-17

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.

Do I need to act?

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0.15% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (3)

Melsoft Navigator

Affected Vendors

Mitsubishielectric

References (6)

Patch https://jvn.jp/vu/JVNVU93817405/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-21-350-05
Patch https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-021_en.pdf
Patch https://jvn.jp/vu/JVNVU93817405/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-21-350-05
Patch https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-021_en.pdf
28
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 9/34 · Low