CVE-2021-45638
9.6 · CRITICALOverview
CVE-2021-45638 is a critical-severity vulnerability affecting netgear d6220_firmware. It was published on December 26, 2021 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
Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000v2 before 1.0.0.74, D8500 before 1.0.3.60, DC112A before 1.0.0.56, R6300v2 before 1.0.4.50, R6400 before 1.0.1.68, R7000 before 1.0.11.116, R7100LG before 1.0.0.70, RBS40V before 2.6.2.8, RBW30 before 2.6.2.2, RS400 before 1.5.1.80, R7000P before 1.3.2.132, and R6900P before 1.3.2.132.
Remediation
Check the references section for vendor advisories and patches from netgear. Update d6220_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 |
|---|---|---|---|
| netgear | d6220_firmware | >= 0, < 1.0.0.68 | Affected |
| netgear | d6400_firmware | >= 0, < 1.0.0.102 | Affected |
| netgear | d7000v2_firmware | >= 0, < 1.0.0.74 | Affected |
| netgear | d8500_firmware | >= 0, < 1.0.3.60 | Affected |
| netgear | dc112a_firmware | >= 0, < 1.0.0.56 | Affected |
| netgear | r6300v2_firmware | >= 0, < 1.0.4.50 | Affected |
| netgear | r6400_firmware | >= 0, < 1.0.1.68 | Affected |
| netgear | r7000_firmware | >= 0, < 1.0.11.116 | Affected |
| netgear | r7100lg_firmware | >= 0, < 1.0.0.70 | Affected |
| netgear | r7000p_firmware | >= 0, < 1.3.2.132 | Affected |
Frequently Asked Questions
What is CVE-2021-45638?
CVE-2021-45638 is a critical-severity vulnerability affecting netgear d6220_firmware. It was published on December 26, 2021 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
How severe is CVE-2021-45638?
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-2021-45638?
Check the references section for vendor advisories and patches from netgear. Update d6220_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-2021-45638?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-45638 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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