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CVE-2020-29583

CRITICALCISA KEV
9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published12/22/2020
Last Modified11/7/2025
Sourcekev
Honeypot Sightings0

CISA KEV

VendorZyxel
ProductMultiple Products
Vulnerability NameZyxel Multiple Products Use of Hard-Coded Credentials Vulnerability
KEV Date Added2021-11-03
Remediation Due Date2022-05-03
Ransomware UseUnknown

Affected Products

zyxel:atp100zyxel:atp100_firmwarezyxel:atp100wzyxel:atp100w_firmwarezyxel:atp200zyxel:atp200_firmwarezyxel:atp500zyxel:atp500_firmwarezyxel:atp700zyxel:atp700_firmwarezyxel:atp800zyxel:atp800_firmwarezyxel:usg110zyxel:usg1100zyxel:usg1100_firmwarezyxel:usg110_firmwarezyxel:usg1900zyxel:usg1900_firmwarezyxel:usg20-vpnzyxel:usg20-vpn_firmwarezyxel:usg20w-vpnzyxel:usg20w-vpn_firmwarezyxel:usg210zyxel:usg210_firmwarezyxel:usg2200zyxel:usg2200_firmwarezyxel:usg310zyxel:usg310_firmwarezyxel:usg40zyxel:usg40_firmwarezyxel:usg40wzyxel:usg40w_firmwarezyxel:usg60zyxel:usg60_firmwarezyxel:usg60wzyxel:usg60w_firmwarezyxel:usg_flex_100zyxel:usg_flex_100_firmwarezyxel:usg_flex_100wzyxel:usg_flex_100w_firmwarezyxel:usg_flex_200zyxel:usg_flex_200_firmwarezyxel:usg_flex_500zyxel:usg_flex_500_firmwarezyxel:usg_flex_700zyxel:usg_flex_700_firmwarezyxel:vpn100zyxel:vpn1000zyxel:vpn1000_firmwarezyxel:vpn100_firmwarezyxel:vpn300zyxel:vpn300_firmwarezyxel:vpn50zyxel:vpn50_firmwarezyxel:zywall110zyxel:zywall1100zyxel:zywall1100_firmwarezyxel:zywall110_firmwarezyxel:zywall310zyxel:zywall310_firmware

Weaknesses (CWE)

CWE-522CWE-522

References

https://www.zyxel.com/support/CVE-2020-29583.shtml(af854a3a-2127-422b-91ae-364da2661108)
https://www.zyxel.com/support/security_advisories.shtml(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.