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

CVE-2021-27251

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

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Authentication is not required to exploit this vulnerability The specific flaw exists within handling of firmware updates. The issue results from a fallback to a insecure protocol to deliver updates.

An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12308.

HIGH · CVSS 8.8 EPSS 0.00295
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-319Cleartext Transmission of Sensitive Information
▤

Affected Products & Versions

43
netgear br200 firmware< 5.10.0.5
netgear br500 firmware< 5.10.0.5
netgear d7800 firmware< 1.0.1.60
netgear ex6100v2 firmware< 1.0.1.98
netgear ex6150 firmware< 1.0.1.98
netgear ex6250 firmware< 1.0.0.134
netgear ex6400 firmware< 1.0.2.158
netgear ex6400v2 firmware< 1.0.0.134
▣

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 NVD14 Apr 2021 · 04:15 PM
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/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-ExtendersPatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-247/Third Party AdvisoryVDB Entry
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