CVE Vulnerability

CVE-2020-29583

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.

10 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.zyxel.com/support/security_advisories.shtml Vendor Advisory
https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15 Release Notes Vendor Advisory
http://ftp.zyxel.com/USG40/firmware/USG40_4.60(AALA.1)C0_2.pdf Vendor Advisory
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release Release Notes Vendor Advisory
https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html Third Party Advisory
https://www.zyxel.com/support/CVE-2020-29583.shtml Vendor Advisory
Configurations

Configuration 1
Information

Published : 2020-12-22 10:15

Updated : 2022-07-12 05:42

NVD link : CVE-2020-29583

Mitre link : CVE-2020-29583

Products Affected

Usg60w Firmware

Zyxel

CWE
CWE-522