high
8.8
CWE
319
Advisory Published
Updated
Advisory Published

CVE-2021-27251: (Pwn2Own) NETGEAR Nighthawk R7800 ready-genie-cloud Insecure Download of Critical Component Remote Code Execution Vulnerability

First published: Wed Apr 14 2021(Updated: )

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.

Credit: zdi-disclosures@trendmicro.com

Affected SoftwareAffected VersionHow to fix
NETGEAR R7800 firmware
NETGEAR BR200<5.10.0.5
NETGEAR BR200
NETGEAR BR500 Firmware<5.10.0.5
NETGEAR br500 firmware
NETGEAR D7800<1.0.1.60
NETGEAR D7800 Firmware
NETGEAR EX6100v2 firmware<1.0.1.98
Netgear EX6100=v2
NETGEAR EX6150<1.0.1.98
NETGEAR EX6150v2=v2
NETGEAR EX6250<1.0.0.134
NETGEAR EX6250
NETGEAR EX6400<1.0.2.158
NETGEAR EX6400v2
NETGEAR EX6400v2 firmware<1.0.0.134
NETGEAR EX6400v2=v2
NETGEAR EX6410<1.0.0.134
NETGEAR EX6410
NETGEAR EX6420<1.0.0.134
NETGEAR EX6420
NETGEAR EX7300<1.0.2.158
NETGEAR EX7300v2
NETGEAR EX7300v2 firmware<1.0.0.134
NETGEAR EX7300v2=v2
NETGEAR EX7320<1.0.0.134
NETGEAR EX7320
NETGEAR EX7700<1.0.0.216
NETGEAR EX7700
NETGEAR EX8000<1.0.1.232
NETGEAR EX8000
NETGEAR LBR20 firmware<2.6.3.50
NETGEAR LBR20 firmware
NETGEAR R7800 firmware<1.0.2.80
NETGEAR R7800 firmware
NETGEAR R8900 firmware<1.0.5.28
NETGEAR R8900
NETGEAR R9000 firmware<1.0.5.28
NETGEAR R9000 firmware
NETGEAR RBK12 firmware<2.7.2.104
NETGEAR RBK12 firmware
NETGEAR RBK13 Firmware<2.7.2.104
NETGEAR rbk13 firmware
NETGEAR RBK14 Firmware<2.7.2.104
NETGEAR rbk14 firmware
NETGEAR RBK15 Firmware<2.7.2.104
NETGEAR RBK15 Firmware
NETGEAR RBK20 Router Firmware<2.6.2.104
NETGEAR Orbi RBK20
NETGEAR RBK23 Satellite Firmware<2.7.2.104
NETGEAR Orbi RBK23
NETGEAR RBK40 Satellite Firmware<2.6.2.104
NETGEAR RBK40 Satellite Firmware
NETGEAR RBK43<2.6.2.104
NETGEAR Orbi RBK43
NETGEAR RBK43 Router Firmware<2.6.2.104
NETGEAR Orbi RBK43S
NETGEAR RBK44 Satellite Firmware<2.6.2.104
NETGEAR RBK44 Satellite Firmware
NETGEAR RBK50 firmware<2.7.2.104
NETGEAR Orbi RBK50
NETGEAR RBK53 Firmware<2.7.2.104
NETGEAR Orbi RBK53
NETGEAR RBR10 firmware<2.6.2.104
NETGEAR RBR10 firmware
NETGEAR RBR20<2.6.2.104
NETGEAR Orbi RBR20
NETGEAR CBR40 firmware<2.6.2.104
NETGEAR RBR40 firmware
NETGEAR RBR50 firmware<2.7.2.104
NETGEAR RBR50 firmware
NETGEAR RBS10<2.6.2.104
NETGEAR RBS10 firmware
NETGEAR RBS20<2.6.2.104
NETGEAR Orbi RBS20
NETGEAR RBS40 Firmware<2.6.2.104
NETGEAR Orbi RBS40
NETGEAR RBS50Y firmware<2.7.2.104
NETGEAR RBS50 Firmware
NETGEAR RBS50Y firmware<2.6.2.104
NETGEAR RBS50Y firmware
NETGEAR XR450 firmware<2.3.2.114
NETGEAR XR450 firmware
NETGEAR XR500<2.3.2.114
NETGEAR XR500 firmware
NETGEAR XR700<1.0.1.38
NETGEAR XR700 firmware

Remedy

https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-27251?

    CVE-2021-27251 has a critical severity rating due to its potential to allow arbitrary code execution without authentication.

  • How do I fix CVE-2021-27251?

    To fix CVE-2021-27251, users should update their NETGEAR Nighthawk R7800 firmware to the latest version, addressing the vulnerability.

  • Which devices are affected by CVE-2021-27251?

    CVE-2021-27251 affects the NETGEAR Nighthawk R7800 and several other NETGEAR devices with specific firmware versions.

  • Can CVE-2021-27251 be exploited remotely?

    Yes, CVE-2021-27251 can be exploited remotely by network-adjacent attackers without the need for authentication.

  • What are the implications of exploiting CVE-2021-27251?

    Exploiting CVE-2021-27251 may allow attackers to execute arbitrary code, potentially leading to a complete compromise of the affected device's functionality.

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