What is CVE-2021-34979?

CVE-2021-34979 is a high-severity vulnerability in NETGEAR R6260, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2022-01-13.

How severe is CVE-2021-34979?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in NETGEAR R6260

CVE-2021-34979

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.

Vulnerability class: Buffer Overflow

EPSS: 0.014 (69.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Netgear R6260 — versions 1.1.0.78_1.0.1
Netgear R6260_firmware — versions 1.1.0.78_1.0.1

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
zdi-disclosures@trendmicro.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34979?: CVE-2021-34979 is a high-severity vulnerability in NETGEAR R6260, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2022-01-13.
How severe is CVE-2021-34979?: High severity. CVSS v3 base score is 8.8 out of 10.