CVE-2021-40867
7.8 · HIGHOverview
CVE-2021-40867 is a high-severity vulnerability affecting netgear gc108p_firmware. It was published on September 13, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
Certain NETGEAR smart switches are affected by an authentication hijacking race-condition vulnerability by an unauthenticated attacker who uses the same source IP address as an admin in the process of logging in (e.g., behind the same NAT device, or already in possession of a foothold on an admin's machine). This occurs because the multi-step HTTP authentication process is effectively tied only to the source IP address. This affects GC108P before 1.0.8.2, GC108PP before 1.0.8.2, GS108Tv3 before 7.0.7.2, GS110TPP before 7.0.7.2, GS110TPv3 before 7.0.7.2, GS110TUP before 1.0.5.3, GS308T before 1.0.3.2, GS310TP before 1.0.3.2, GS710TUP before 1.0.5.3, GS716TP before 1.0.4.2, GS716TPP before 1.0.4.2, GS724TPP before 2.0.6.3, GS724TPv2 before 2.0.6.3, GS728TPPv2 before 6.0.8.2, GS728TPv2 before 6.0.8.2, GS750E before 1.0.1.10, GS752TPP before 6.0.8.2, GS752TPv2 before 6.0.8.2, MS510TXM before 1.0.4.2, and MS510TXUP before 1.0.4.2.
Remediation
Check the references section for vendor advisories and patches from netgear. Update gc108p_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 | gc108p_firmware | >= 0, < 1.0.8.2 | Affected |
| netgear | gc108pp_firmware | >= 0, < 1.0.8.2 | Affected |
| netgear | gs108t_firmware | >= 0, < 7.0.7.2 | Affected |
| netgear | gs110tpp_firmware | >= 0, < 7.0.7.2 | Affected |
| netgear | gs110tp_firmware | >= 0, < 7.0.7.2 | Affected |
| netgear | gs110tup_firmware | >= 0, < 1.0.5.3 | Affected |
| netgear | gs308t_firmware | >= 0, < 1.0.3.2 | Affected |
| netgear | gs310tp_firmware | >= 0, < 1.0.3.2 | Affected |
| netgear | gs710tup_firmware | >= 0, < 1.0.5.3 | Affected |
| netgear | gs716tp_firmware | >= 0, < 1.0.4.2 | Affected |
References
Frequently Asked Questions
What is CVE-2021-40867?
CVE-2021-40867 is a high-severity vulnerability affecting netgear gc108p_firmware. It was published on September 13, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-40867?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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-2021-40867?
Check the references section for vendor advisories and patches from netgear. Update gc108p_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-2021-40867?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-40867 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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