What is the severity of ZDI-21-1242?

The severity of ZDI-21-1242 is high due to its potential for arbitrary code execution by network-adjacent attackers.

How do I fix ZDI-21-1242?

To fix ZDI-21-1242, update your NETGEAR R6260 router to the latest firmware version provided by NETGEAR.

What components of the NETGEAR R6260 are affected by ZDI-21-1242?

The vulnerability specifically affects the setupwizard.cgi page within the NETGEAR R6260 firmware.

Is authentication required to exploit ZDI-21-1242?

No, authentication is not required to exploit the ZDI-21-1242 vulnerability on affected NETGEAR R6260 routers.

Vulnerability/
ZDI-21-1242

high

8.8

2/2/2025

ZDI-21-1242: NETGEAR R6260 setupwizard.cgi Stack-based Buffer Overflow Remote Code Execution Vulnerability

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the setupwizard.cgi page. When parsing the SOAP_LOGIN_TOKEN environment variable, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

Affected Software	Affected Version	How to fix
NETGEAR R6260 firmware

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Frequently Asked Questions

What is the severity of ZDI-21-1242?
The severity of ZDI-21-1242 is high due to its potential for arbitrary code execution by network-adjacent attackers.
How do I fix ZDI-21-1242?
To fix ZDI-21-1242, update your NETGEAR R6260 router to the latest firmware version provided by NETGEAR.
What type of attacks can exploit ZDI-21-1242?
ZDI-21-1242 can be exploited by network-adjacent attackers to execute arbitrary code without authentication.
What components of the NETGEAR R6260 are affected by ZDI-21-1242?
The vulnerability specifically affects the setupwizard.cgi page within the NETGEAR R6260 firmware.
Is authentication required to exploit ZDI-21-1242?
No, authentication is not required to exploit the ZDI-21-1242 vulnerability on affected NETGEAR R6260 routers.

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agent/description
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source/ZDI
alias/ZDI-21-1242
alias/ZDI-CAN-14107
alias/CVE-2021-34980
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vendor/netgear
canonical/netgear r6260 firmware

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