CVE-2021-3966
9.6 · CRITICALOverview
CVE-2021-3966 is a critical-severity vulnerability affecting zephyrproject zephyr. It was published on January 11, 2023 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.
Remediation
Check the references section for vendor advisories and patches from zephyrproject. Update zephyr 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 |
|---|---|---|---|
| zephyrproject | zephyr | >= 0, < 3.0.0 | Affected |
Frequently Asked Questions
What is CVE-2021-3966?
CVE-2021-3966 is a critical-severity vulnerability affecting zephyrproject zephyr. It was published on January 11, 2023 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
How severe is CVE-2021-3966?
This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-3966?
Check the references section for vendor advisories and patches from zephyrproject. Update zephyr 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-2021-3966?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3966 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.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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