NetGear · Netgear R6220 · CVE-2020-27867
**Name of the Vulnerable Software and Affected Versions**
NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 firmware version 1.2.0.62 1.0.1
**Description**
This issue allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR routers. Although authentication is required to exploit this issue, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini httpd service, which listens on TCP port 80 by default. When parsing the `funjsq access token` parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this issue to execute code in the context of root.
**Recommendations**
For NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 firmware version 1.2.0.62 1.0.1, consider disabling the mini httpd service until a patch is available. As a temporary workaround, restrict access to the `funjsq access token` parameter to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.