CVE-2021-31802

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable from the local network without authentication. The vulnerability exists within the handling of an HTTP request. An attacker can leverage this to execute code as root. The problem is that a user-provided length value is trusted during a backup.cgi file upload. The attacker must add a \n before the Content-Length header.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/Exploit, Third Party Advisory
https://www.netgear.com/about/security/Vendor Advisory
https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/Exploit, Third Party Advisory
https://www.netgear.com/about/security/Vendor Advisory

Timeline

Published: Apr 26, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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