CVE-2021-39306
9.8 · CRITICALOverview
CVE-2021-39306 is a critical-severity vulnerability affecting realtek rtl8195am_firmware. It was published on December 22, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.
Remediation
Check the references section for vendor advisories and patches from realtek. Update rtl8195am_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 |
|---|---|---|---|
| realtek | rtl8195am_firmware | >= 0, < 2.0.10 | Affected |
Frequently Asked Questions
What is CVE-2021-39306?
CVE-2021-39306 is a critical-severity vulnerability affecting realtek rtl8195am_firmware. It was published on December 22, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-39306?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-39306?
Check the references section for vendor advisories and patches from realtek. Update rtl8195am_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-2021-39306?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-39306 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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