CVE-2020-27861

HIGH

NETGEAR Orbi and Extenders Firmware < 2.6.1.44 - Unauthenticated OS Command Injection via DHCP Host Name Option

Title source: llm

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.

References (2)

Core 2

Core References

Third Party Advisory, VDB Entry x_refsource_misc

https://www.zerodayinitiative.com/advisories/ZDI-20-1430/

Vendor Advisory x_refsource_misc

https://kb.netgear.com/000062507/Security-Advisory-for-Unauthenticated-Command-Injection-Vulnerability-on-Some-Extenders-and-Orbi-WiFi-Systems

Scores

CVSS v3 8.8

EPSS 0.0102

EPSS Percentile 77.5%

Attack Vector ADJACENT_NETWORK

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

Details

CWE

CWE-78

Status published

Products (39)

netgear/cbk40_firmware < 2.6.1.38

netgear/cbk43_firmware < 2.6.1.38

netgear/cbr40_firmware < 2.6.1.38

netgear/ex6200_firmware < 1.0.1.82

netgear/ex7700_firmware < 1.0.0.210

netgear/ex8000_firmware < 1.0.1.224

netgear/rbk12_firmware < 2.6.1.44

netgear/rbk13_firmware < 2.6.1.44

netgear/rbk14_firmware < 2.6.1.44

netgear/rbk15_firmware < 2.6.1.44

... and 29 more

Published Feb 12, 2021

Tracked Since Feb 18, 2026