CVE-2020-29583

KEV
Published: Dic 22, 2020 Last Modified: Nov 07, 2025
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
HIGH 10,0
Source: [email protected]
Access Vector: network
Access Complexity: low
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,9437
Percentile
1,0th
Updated

EPSS Score Trend (Last 91 Days)

522

Insufficiently Protected Credentials

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Gain Privileges Or Assume Identity
Applicable Platforms
Technologies: ICS/OT, Not Technology-Specific, Web Based
View CWE Details
Operating System

Usg60W Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg60W Firmware
Version 4.60
cpe:2.3:o:zyxel:usg60w_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg Flex 100 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg Flex 100 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg_flex_100_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg60 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg60 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg60_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Vpn300 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Vpn300 Firmware
Version 4.60
cpe:2.3:o:zyxel:vpn300_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp800 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp800 Firmware
Version 4.60
cpe:2.3:o:zyxel:atp800_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Zywall1100 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Zywall1100 Firmware
Version 4.60
cpe:2.3:o:zyxel:zywall1100_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg Flex 200 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg Flex 200 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg_flex_200_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg40 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg40 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg40_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp500 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp500 Firmware
Version 4.60
cpe:2.3:o:zyxel:atp500_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg Flex 700 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg Flex 700 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg_flex_700_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg Flex 500 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg Flex 500 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg_flex_500_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Zywall110 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Zywall110 Firmware
Version 4.60
cpe:2.3:o:zyxel:zywall110_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg310 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg310 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg310_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp100W Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp100W Firmware
Version 4.60
cpe:2.3:o:zyxel:atp100w_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg210 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg210 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg210_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Vpn100 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Vpn100 Firmware
Version 4.60
cpe:2.3:o:zyxel:vpn100_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg20-Vpn Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg20-Vpn Firmware
Version 4.60
cpe:2.3:o:zyxel:usg20-vpn_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg1900 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg1900 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg1900_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg110 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg110 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg110_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp100 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp100 Firmware
Version 4.60
cpe:2.3:o:zyxel:atp100_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg1100 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg1100 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg1100_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg Flex 100W Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg Flex 100W Firmware
Version 4.60
cpe:2.3:o:zyxel:usg_flex_100w_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg2200 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg2200 Firmware
Version 4.60
cpe:2.3:o:zyxel:usg2200_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg40W Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg40W Firmware
Version 4.60
cpe:2.3:o:zyxel:usg40w_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp200 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp200 Firmware
Version 4.60
cpe:2.3:o:zyxel:atp200_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Zywall310 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Zywall310 Firmware
Version 4.60
cpe:2.3:o:zyxel:zywall310_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Atp700 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Atp700 Firmware
Version 4.60
cpe:2.3:o:zyxel:atp700_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Vpn1000 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Vpn1000 Firmware
Version 4.60
cpe:2.3:o:zyxel:vpn1000_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Usg20W-Vpn Firmware by Zyxel

Product Information
Vendor Zyxel
Product Usg20W-Vpn Firmware
Version 4.60
cpe:2.3:o:zyxel:usg20w-vpn_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Vpn50 Firmware by Zyxel

Product Information
Vendor Zyxel
Product Vpn50 Firmware
Version 4.60
cpe:2.3:o:zyxel:vpn50_firmware:4.60:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020…
http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C…
http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C0_2.pdf
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-r…
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmw…
https://businessforum.zyxel.com/discussion/5254/whats-new-f…
https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-a…
https://www.eyecontrol.nl/blog/undocumented-user-account-in…
https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html
https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-…
https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-al…
https://www.zyxel.com/support/CVE-2020-29583.shtml
https://www.zyxel.com/support/CVE-2020-29583.shtml
https://www.zyxel.com/support/security_advisories.shtml
https://www.zyxel.com/support/security_advisories.shtml
http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C…
http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C0_2.pdf
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-r…
https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmw…
https://businessforum.zyxel.com/discussion/5254/whats-new-f…
https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-a…
https://www.eyecontrol.nl/blog/undocumented-user-account-in…
https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html
https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-…
https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-al…
https://www.zyxel.com/support/CVE-2020-29583.shtml
https://www.zyxel.com/support/CVE-2020-29583.shtml
https://www.zyxel.com/support/security_advisories.shtml
https://www.zyxel.com/support/security_advisories.shtml