CVE-2020-5666
Last modified
CVE-2020-5666 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 8.40% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishielectric | Melsec Iq-R00 Firmware | >= 05, <= 19 |
| Mitsubishielectric | Melsec Iq-R01 Firmware | >= 05, <= 19 |
| Mitsubishielectric | Melsec Iq-R02 Firmware | >= 05, <= 19 |
| Mitsubishielectric | Melsec Iq-R04 Firmware | >= 35, <= 51 |
| Mitsubishielectric | Melsec Iq-R16 Firmware | >= 35, <= 51 |
| Mitsubishielectric | Melsec Iq-R08 Firmware | >= 35, <= 51 |
| Mitsubishielectric | Melsec Iq-R32 Firmware | >= 35, <= 51 |
| Mitsubishielectric | Melsec Iq-R120 Firmware | >= 35, <= 51 |
References
- https://jvn.jp/en/jp/JVN44764844/index.htmlThird Party Advisory
- https://jvn.jp/jp/JVN44764844/index.htmlThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01Third Party Advisory, US Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdfMitigation, Vendor Advisory
- https://jvn.jp/en/jp/JVN44764844/index.htmlThird Party Advisory
- https://jvn.jp/jp/JVN44764844/index.htmlThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01Third Party Advisory, US Government Resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdfMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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