What is the severity of ZDI-21-1051?

The severity of ZDI-21-1051 is considered critical due to the ability for network-adjacent attackers to bypass authentication without any prior authentication requirements.

How do I fix ZDI-21-1051?

To mitigate ZDI-21-1051, it is essential to update your NETGEAR router firmware to the latest version that addresses this vulnerability.

Which NETGEAR routers are affected by ZDI-21-1051?

ZDI-21-1051 affects multiple models of NETGEAR routers that utilize the mini_httpd service.

What are the implications of ZDI-21-1051?

The implications of ZDI-21-1051 include unauthorized access to the router settings by attackers, potentially leading to a complete compromise of the network.

Is authentication required to exploit ZDI-21-1051?

No, authentication is not required to exploit ZDI-21-1051, making it particularly dangerous for users.

Vulnerability/
ZDI-21-1051

high

8.8

23/2/2025

ZDI-21-1051: NETGEAR Multiple Routers mini_httpd Authentication Bypass Vulnerability

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.

Affected Software	Affected Version	How to fix
NETGEAR Multiple Devices

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Frequently Asked Questions

What is the severity of ZDI-21-1051?
The severity of ZDI-21-1051 is considered critical due to the ability for network-adjacent attackers to bypass authentication without any prior authentication requirements.
How do I fix ZDI-21-1051?
To mitigate ZDI-21-1051, it is essential to update your NETGEAR router firmware to the latest version that addresses this vulnerability.
Which NETGEAR routers are affected by ZDI-21-1051?
ZDI-21-1051 affects multiple models of NETGEAR routers that utilize the mini_httpd service.
What are the implications of ZDI-21-1051?
The implications of ZDI-21-1051 include unauthorized access to the router settings by attackers, potentially leading to a complete compromise of the network.
Is authentication required to exploit ZDI-21-1051?
No, authentication is not required to exploit ZDI-21-1051, making it particularly dangerous for users.

agent/references
agent/type
agent/softwarecombine
agent/severity
agent/title
agent/event
agent/description
agent/source
agent/tags
collector/zdi-advisory
source/ZDI
alias/ZDI-21-1051
alias/ZDI-CAN-13313
alias/CVE-2021-34865
agent/software-canonical-lookup
agent/software-canonical-lookup-request
vendor/netgear
canonical/netgear multiple devices

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