CVE-2021-22659
8.6 · HIGHOverview
CVE-2021-22659 is a high-severity vulnerability affecting rockwellautomation micrologix_1400_firmware. It was published on March 25, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.
Remediation
Check the references section for vendor advisories and patches from rockwellautomation. Update micrologix_1400_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 |
|---|---|---|---|
| rockwellautomation | micrologix_1400_firmware | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-22659?
CVE-2021-22659 is a high-severity vulnerability affecting rockwellautomation micrologix_1400_firmware. It was published on March 25, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).
How severe is CVE-2021-22659?
This vulnerability has a CVSS 3.1 base score of 8.6, 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-2021-22659?
Check the references section for vendor advisories and patches from rockwellautomation. Update micrologix_1400_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-2021-22659?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-22659 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.
Automated penetration testing that runs continuously, not just quarterly.
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