Home/CVE/This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi
CVE

CVE-2020-27861

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi

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.

HIGH · CVSS 8.8 EPSS 0.01023
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

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
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · zdi-disclosures@trendmicro.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Feb 2021 · 12:15 AM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://kb.netgear.com/000062507/Security-Advisory-for-Unauthenticated-Command-Injection-Vulnerability-on-Some-Extenders-and-Orbi-WiFi-SystemsVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1430/Third Party AdvisoryVDB Entry
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