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CVE-2021-34865

HIGHCVSS 8.8/10EPSS 3.08%

Last modified

CVE-2021-34865 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. EPSS estimates a 3.08% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
3.08%

86.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NetgearAc2100 Firmware< 1.2.0.88
NetgearAc2400 Firmware< 1.2.0.88
NetgearAc2600 Firmware< 1.2.0.88
NetgearD7000v1 Firmware< 1.0.1.80
NetgearR6220 Firmware< 1.1.0.110
NetgearR6230 Firmware< 1.1.0.110
NetgearR6260 Firmware< 1.1.0.84
NetgearR6330 Firmware< 1.1.0.84
NetgearR6350 Firmware< 1.1.0.84
NetgearR6700v2 Firmware< 1.2.0.88
NetgearR6800 Firmware< 1.2.0.88
NetgearR6850 Firmware< 1.1.0.84
NetgearR6900v2 Firmware< 1.2.0.88
NetgearR7200 Firmware< 1.2.0.88
NetgearR7350 Firmware< 1.2.0.88
NetgearR7400 Firmware< 1.2.0.88
NetgearR7450 Firmware< 1.2.0.88

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-34865?
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.
How severe is CVE-2021-34865?
CVE-2021-34865 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.08% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34865?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34865?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST