CVE-2021-35029

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An authentication bypasss vulnerability in the web-based management interface of Zyxel USG/Zywall series firmware versions 4.35 through 4.64 and USG Flex, ATP, and VPN series firmware versions 4.35 through 5.01, which could allow a remote attacker to execute arbitrary commands on an affected device.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

VendorProductVersions
ZyxelUSG/Zywall series Firmware4.35 through 4.64
ZyxelUSG FLEX series Firmware4.35 through 5.01
ZyxelATP series Firmware4.35 through 5.01
ZyxelVPN series Firmware4.35 through 5.01

References

Timeline

Published
Jul 2, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-35029: Critical severity, CVSS 9.8 | Vulnix