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CVE-2021-34980 Details

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 1.1.0.78_1.0.1 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. Was ZDI-CAN-14107.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://kb.netgear.com/000064262/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-PSV-2021-0150?article=000064262	CVE	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1242/	CVE	Third Party AdvisoryVDB Entry
https://kb.netgear.com/000064262/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-PSV-2021-0150?article=000064262	[email protected]	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1242/	[email protected]	Third Party AdvisoryVDB Entry

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]
CWE-121	Stack-based Buffer Overflow	[email protected]

Affected Products

Product	Versions
netgear r6260 firmware	1.1.0.78_1.0.1
CPE cpe:2.3:o:netgear:r6260_firmware:1.1.0.78_1.0.1:::::::* Remediation No remediation found in references.
netgear r6260	All versions
CPE cpe:2.3:h:netgear:r6260:-:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jan 19, 2022	Initial Analysis	[email protected]