Exploited
critical
10
CWE
522
Advisory Published
Updated

CVE-2020-29583: Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability

First published: Tue Dec 22 2020(Updated: )

Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Zyxel Multiple Products
Zyxel USG20-VPN Firmware=4.60
Zyxel USG20
Zyxel USG 20w-VPN Firmware=4.60
Zyxel USG20W-VPN Firmware
Zyxel USG 40 firmware=4.60
Zyxel USG 40
Zyxel USG 40w firmware=4.60
Zyxel USG40W
Zyxel USG60 Firmware=4.60
Zyxel USG 60
Zyxel USG60W Firmware=4.60
Zyxel USG 60w
Zyxel USG 110 Firmware=4.60
Zyxel USG 110
Zyxel USG210 Firmware=4.60
Zyxel USG210
Zyxel USG 310 firmware=4.60
Zyxel USG 310
Zyxel USG1100 firmware=4.60
Zyxel USG1100 firmware
Zyxel USG1900 Firmware=4.60
Zyxel USG1900 Firmware
Zyxel USG2200 Firmware=4.60
Zyxel USG2200-VPN
Zyxel Zywall 110=4.60
Zyxel Zywall 110
Zyxel ZyWALL USG 310 firmware=4.60
Zyxel Zywall 310
Zyxel Zywall 1100 Firmware=4.60
Zyxel Zywall 1100
All of
Zyxel USG20-VPN Firmware=4.60
Zyxel USG20
All of
Zyxel USG 20w-VPN Firmware=4.60
Zyxel USG20W-VPN Firmware
All of
Zyxel USG 40 firmware=4.60
Zyxel USG 40
All of
Zyxel USG 40w firmware=4.60
Zyxel USG40W
All of
Zyxel USG60 Firmware=4.60
Zyxel USG 60
All of
Zyxel USG60W Firmware=4.60
Zyxel USG 60w
All of
Zyxel USG 110 Firmware=4.60
Zyxel USG 110
All of
Zyxel USG210 Firmware=4.60
Zyxel USG210
All of
Zyxel USG 310 firmware=4.60
Zyxel USG 310
All of
Zyxel USG1100 firmware=4.60
Zyxel USG1100 firmware
All of
Zyxel USG1900 Firmware=4.60
Zyxel USG1900 Firmware
All of
Zyxel USG2200 Firmware=4.60
Zyxel USG2200-VPN
All of
Zyxel Zywall 110=4.60
Zyxel Zywall 110
All of
Zyxel ZyWALL USG 310 firmware=4.60
Zyxel Zywall 310
All of
Zyxel Zywall 1100 Firmware=4.60
Zyxel Zywall 1100
All of
Zyxel ATP100 Firmware=4.60
Zyxel ATP100 Firmware
All of
Zyxel ATP100W Firmware=4.60
Zyxel ATP100W Firmware
All of
Zyxel ATP200 firmware=4.60
Zyxel ATP200 firmware
All of
Zyxel ATP500 Firmware=4.60
Zyxel ATP500 Firmware
All of
Zyxel ATP700 Firmware=4.60
Zyxel ATP700 Firmware
All of
Zyxel ATP800=4.60
Zyxel ATP800 Firmware
All of
Zyxel Zywall VPN 50 Firmware=4.60
Zyxel VPN50 Firmware
All of
Zyxel VPN100=4.60
Zyxel VPN100 Firmware
All of
Zyxel Zywall VPN 300 Firmware=4.60
Zyxel VPN300
All of
Zyxel VPN1000 Firmware=4.60
Zyxel VPN1000 Firmware
All of
Zyxel USG Flex 100 firmware=4.60
Zyxel USG FLEX 100
All of
Zyxel USG FLEX 100w firmware=4.60
Zyxel USG FLEX 100w firmware
All of
Zyxel USG FLEX 200=4.60
Zyxel USG FLEX 200 firmware
All of
Zyxel USG FLEX 500=4.60
Zyxel USG FLEX 500 firmware
All of
Zyxel USG FLEX 700 firmware=4.60
Zyxel USG FLEX 700 firmware

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Reference Links

Frequently Asked Questions

  • What is CVE-2020-29583?

    CVE-2020-29583 is a vulnerability found in Zyxel multiple products that allows unauthorized access with admin privileges.

  • How severe is CVE-2020-29583?

    CVE-2020-29583 has a severity rating of 9.8 out of 10, making it a critical vulnerability.

  • Which Zyxel devices are affected by CVE-2020-29583?

    Zyxel devices with firmware version 4.60, including USG20, USG20W, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200, Zywall110, Zywall310, and Zywall1100, are affected by CVE-2020-29583.

  • How can I fix CVE-2020-29583?

    To fix CVE-2020-29583, you need to upgrade the firmware of the affected Zyxel device to version 4.60 Patch 1 or later.

  • Where can I find more information about CVE-2020-29583?

    You can find more information about CVE-2020-29583 on the Zyxel support forum and the official Zyxel website.

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