high
8.8
CWE
697 287
Advisory Published
Updated
Advisory Published

CVE-2021-34865: NETGEAR Multiple Routers mini_httpd Authentication Bypass Vulnerability

First published: Tue Jan 25 2022(Updated: )

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.

Credit: zdi-disclosures@trendmicro.com

Affected SoftwareAffected VersionHow to fix
Netgear Ac2100 Firmware<1.2.0.88
Netgear Ac2100
Netgear Ac2400 Firmware<1.2.0.88
Netgear Ac2400
Netgear Ac2600 Firmware<1.2.0.88
Netgear Ac2600
Netgear D7000v1 Firmware<1.0.1.80
Netgear D7000v1
Netgear R6220 Firmware<1.1.0.110
NETGEAR R6220
Netgear R6230 Firmware<1.1.0.110
Netgear R6230
Netgear R6260 Firmware<1.1.0.84
NETGEAR R6260
Netgear R6330 Firmware<1.1.0.84
Netgear R6330
Netgear R6350 Firmware<1.1.0.84
Netgear R6350
Netgear R6700v2 Firmware<1.2.0.88
NETGEAR R6700v2
Netgear R6800 Firmware<1.2.0.88
Netgear R6800
Netgear R6850 Firmware<1.1.0.84
Netgear R6850
Netgear R6900v2 Firmware<1.2.0.88
Netgear R6900v2
Netgear R7200 Firmware<1.2.0.88
Netgear R7200
Netgear R7350 Firmware<1.2.0.88
Netgear R7350
Netgear R7400 Firmware<1.2.0.88
Netgear R7400
Netgear R7450 Firmware<1.2.0.88
NETGEAR R7450
NETGEAR Multiple Routers

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-34865?

    CVE-2021-34865 is a vulnerability that allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers.

  • How severe is CVE-2021-34865?

    CVE-2021-34865 has a severity rating of 8.8 (high).

  • Which routers are affected by CVE-2021-34865?

    Multiple routers from NETGEAR, including AC2100, AC2400, AC2600, D7000v1, R6220, R6230, R6260, R6330, R6350, R6700v2, R6800, R6850, R6900v2, R7200, R7350, R7400, and R7450, are affected by CVE-2021-34865.

  • How can the CVE-2021-34865 vulnerability be exploited?

    The CVE-2021-34865 vulnerability can be exploited by network-adjacent attackers without requiring authentication.

  • Are there any available fixes for CVE-2021-34865?

    Yes, NETGEAR has released firmware updates to address the CVE-2021-34865 vulnerability. It is recommended to update the firmware of affected routers to the latest version provided by NETGEAR.

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