CVE-2021-34979

Name: CVE-2021-34979
Creator: NVD / NIST
Published: 2022-01-13T22:15:12.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.37%

Last modified Jun 17, 2026

CVE-2021-34979 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 1.37% chance of exploitation in the next 30 days.

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 handling of SOAP requests. When parsing the SOAPAction header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13512.

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

1.37%

68.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Netgear	R6260 Firmware	1.1.0.78_1.0.1

References

https://kb.netgear.com/000064261/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-PSV-2021-0152?article=000064261Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1241/Third Party Advisory, VDB Entry
https://kb.netgear.com/000064261/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-PSV-2021-0152?article=000064261Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1241/Third Party Advisory, VDB Entry

Timeline

Published: Jan 13, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34979?

How severe is CVE-2021-34979?

CVE-2021-34979 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34979?

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-2021-34979?

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

Scan your code now

Source: NVD / NIST