CVE-2021-20608

7.5 highEPSS 2.9%

High (7.5) in mitsubishielectric gx works2. EPSS 2.9% chance of exploitation in the next 30 days.

Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior allows a remote unauthenticated attacker to cause a DoS condition in GX Works2 by getting GX Works2 to read a tampered program file from a Mitsubishi Electric PLC by sending malicious crafted packets to tamper with the program file.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 2.9% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-11-01)
Published: 2021-12-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mitsubishielectric:gx_works2

References

https://jvn.jp/vu/JVNVU93019896/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf
https://jvn.jp/vu/JVNVU93019896/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04

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