How severe is CVE-2021-27253?

This vulnerability has a severity rating of HIGH with a CVSS score of 8.8 out of 10.

What type of vulnerability is CVE-2021-27253?

This is classified as CWE-122, which is a common weakness in software security.

CVE-2021-27253 - HIGH Severity | CVSS 8.8

Vulnerability Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_bind.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12303.

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