CVE-2021-32984 CRITICAL

CVE-2021-32984: Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel

Vendor Automation Direct
Product CLICK PLC CPU Modules: C0-1x CPUs
Weakness CWE-288
Published April 4, 2022
Last update April 16, 2025
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

All programming connections receive the same unlocked privileges, which can result in a privilege escalation. During the time Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, an attacker can connect to the PLC and read the project without authorization.

Key dates

02Disclosure timeline

April 4, 2022 CVE published
April 16, 2025 Record updated