CVE-2021-20608

moderate-risk
Published 2021-12-17

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.

Do I need to act?

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0.26% 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
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Mitsubishielectric

References (6)

Third Party Advisory https://jvn.jp/vu/JVNVU93019896/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04
Vendor Advisory https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf
Third Party Advisory https://jvn.jp/vu/JVNVU93019896/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04
Vendor Advisory https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf
32
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal