CVE-2021-20594
7.5 · HIGHOverview
CVE-2021-20594 is a high-severity vulnerability affecting mitsubishielectric r08sfcpu_firmware. It was published on August 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.
Remediation
Check the references section for vendor advisories and patches from mitsubishielectric. Update r08sfcpu_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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References
Frequently Asked Questions
What is CVE-2021-20594?
CVE-2021-20594 is a high-severity vulnerability affecting mitsubishielectric r08sfcpu_firmware. It was published on August 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-20594?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20594?
Check the references section for vendor advisories and patches from mitsubishielectric. Update r08sfcpu_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20594?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20594 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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