CVE-2020-5666

high-risk
Published 2020-11-16

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series CPU Modules (R00/01/02CPU Firmware versions from '05' to '19' and R04/08/16/32/120(EN)CPU Firmware versions from '35' to '51') allows a remote attacker to cause an error in a CPU unit via a specially crafted HTTP packet, which may lead to a denial-of-service (DoS) condition in execution of the program and its communication.

Do I need to act?

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18.4% chance of exploitation in next 30 days
EPSS score — higher than 82% of all CVEs
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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 (8)

Affected Vendors

Mitsubishielectric

References (8)

Third Party Advisory https://jvn.jp/en/jp/JVN44764844/index.html
Third Party Advisory https://jvn.jp/jp/JVN44764844/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01
Mitigation https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdf
Third Party Advisory https://jvn.jp/en/jp/JVN44764844/index.html
Third Party Advisory https://jvn.jp/jp/JVN44764844/index.html
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01
Mitigation https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdf
53
/ 100
high-risk
Severity 26/34 · High
Exploitability 13/34 · Low
Exposure 14/34 · Moderate