CVE-2021-45626
9.6 · CRITICALOverview
CVE-2021-45626 is a critical-severity vulnerability affecting netgear rbk20_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 command injection by an unauthenticated attacker. This affects RBK20 before 2.6.1.36, RBR20 before 2.6.1.36, RBS20 before 2.6.1.38, RBK40 before 2.6.1.36, RBR40 before 2.6.1.36, RBS40 before 2.6.1.38, RBK50 before 2.6.1.40, RBR50 before 2.6.1.40, RBS50 before 2.6.1.40, and RBS50Y before 2.6.1.40.
Remediation
Check the references section for vendor advisories and patches from netgear. Update rbk20_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 | rbk20_firmware | >= 0, < 2.6.1.38 | Affected |
| netgear | rbr20_firmware | >= 0, < 2.6.1.36 | Affected |
| netgear | rbs20_firmware | >= 0, < 2.6.1.38 | Affected |
| netgear | rbk40_firmware | >= 0, < 2.6.1.38 | Affected |
| netgear | rbr40_firmware | >= 0, < 2.6.1.36 | Affected |
| netgear | rbs40_firmware | >= 0, < 2.6.1.38 | Affected |
| netgear | rbk50_firmware | >= 0, < 2.6.1.40 | Affected |
| netgear | rbr50_firmware | >= 0, < 2.6.1.40 | Affected |
| netgear | rbs50_firmware | >= 0, < 2.6.1.40 | Affected |
| netgear | rbs50y_firmware | >= 0, < 2.6.1.40 | Affected |
Frequently Asked Questions
What is CVE-2021-45626?
CVE-2021-45626 is a critical-severity vulnerability affecting netgear rbk20_firmware. It was published on December 26, 2021 and has a CVSS 3.1 base score of 9.6 (CRITICAL).
How severe is CVE-2021-45626?
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-2021-45626?
Check the references section for vendor advisories and patches from netgear. Update rbk20_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-2021-45626?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-45626 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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