CVE-2021-32984

Automation Direct CLICK PLC CPU Modules Authentication Bypass Using an Alternate Path or Channel

Published Apr 4, 2022 CVSS 3.1 · 9.8 Critical EPSS 1.1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

Automation Direct reports these vulnerabilities are all mitigated by Version 3.00 and recommends users update software and firmware to the latest version. Automation Direct also recommends users follow its security guidelines.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2021-19705 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Apr 16, 2025, 4:31 PM
Reserved
May 13, 2021, 12:00 AM
Status
Modified
Published
Apr 4, 2022, 8:15 PM
Modified
Jun 17, 2026, 3:53 AM