Vulnerability · Published Feb 11, 2021 · Assigned by zdi
CVE-2020-27866
High 8.8
In plain English
A high-severity authentication bypass in Multiple Routers from NETGEAR. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.7% (higher than 95% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NETGEAR | Multiple Routers | firmware version 1.2.0.62_1.0.1 |
Weakness: CWE-288 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H