CVE-2021-27253

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.

CVSS 3.1

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

EPSS

1.13% probability · 64th percentile

CISA KEV

Not listed

Weakness

CWE-122, CWE-787

Affected

netgear/br200 firmware · netgear/br500 firmware · netgear/d7800 firmware · netgear/ex6100v2 firmware · netgear/ex6150 firmware · netgear/ex6250 firmware · netgear/ex6400 firmware · netgear/ex6400v2 firmware · netgear/ex6410 firmware · netgear/ex6420 firmware · netgear/ex7300 firmware · netgear/ex7300v2 firmware · netgear/ex7320 firmware · netgear/ex7700 firmware · netgear/ex8000 firmware · netgear/lbr20 firmware · netgear/r7800 firmware · netgear/r8900 firmware · netgear/r9000 firmware · netgear/rbk12 firmware · +23 more

Source

zdi-disclosures@trendmicro.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.