CVE-2021-21388
8.9 · HIGHOverview
CVE-2021-21388 is a high-severity vulnerability affecting systeminformation systeminformation. It was published on April 29, 2021 and has a CVSS 3.1 base score of 8.9 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
systeminformation is an open source system and OS information library for node.js. A command injection vulnerability has been discovered in versions of systeminformation prior to 5.6.4. The issue has been fixed with a parameter check on user input. Please upgrade to version >= 5.6.4. If you cannot upgrade, be sure to check or sanitize service parameters that are passed to si.inetLatency(), si.inetChecksite(), si.services(), si.processLoad() and other commands. Only allow strings, reject any arrays. String sanitation works as expected.
Remediation
Check the references section for vendor advisories and patches from systeminformation. Update systeminformation 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 |
|---|---|---|---|
| systeminformation | systeminformation | >= 0, < 5.6.4 | Affected |
References
Frequently Asked Questions
What is CVE-2021-21388?
CVE-2021-21388 is a high-severity vulnerability affecting systeminformation systeminformation. It was published on April 29, 2021 and has a CVSS 3.1 base score of 8.9 (HIGH).
How severe is CVE-2021-21388?
This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-21388?
Check the references section for vendor advisories and patches from systeminformation. Update systeminformation 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-2021-21388?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21388 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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