CVE-2021-21279
7.5 · HIGHOverview
CVE-2021-21279 is a high-severity vulnerability affecting contiki-ng contiki-ng. It was published on June 18, 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
Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In verions prior to 4.6, an attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages. This type of attack can effectively shut down the operation of the system because of the cooperative scheduling used for the main parts of Contiki-NG and its communication stack. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.
Remediation
Check the references section for vendor advisories and patches from contiki-ng. Update contiki-ng 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 |
|---|---|---|---|
| contiki-ng | contiki-ng | >= 0, < 4.6 | Affected |
Frequently Asked Questions
What is CVE-2021-21279?
CVE-2021-21279 is a high-severity vulnerability affecting contiki-ng contiki-ng. It was published on June 18, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-21279?
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-2021-21279?
Check the references section for vendor advisories and patches from contiki-ng. Update contiki-ng 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-2021-21279?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21279 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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Browser-based exploitation validates findings with real proof-of-concept.
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