CVE-2021-27853
4.7 · MEDIUMOverview
CVE-2021-27853 is a medium-severity vulnerability affecting ieee ieee_802.2. It was published on September 27, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.
Remediation
Check the references section for vendor advisories and patches from ieee. Update ieee_802.2 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 |
|---|---|---|---|
| ieee | ieee_802.2 | 0 | Affected |
| ietf | p802.1q | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-27853?
CVE-2021-27853 is a medium-severity vulnerability affecting ieee ieee_802.2. It was published on September 27, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2021-27853?
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. 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-2021-27853?
Check the references section for vendor advisories and patches from ieee. Update ieee_802.2 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-2021-27853?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-27853 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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