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CVE-2021-32978

Automation Direct CLICK PLC CPU Modules Plaintext Storage of a Password

HIGH

7.5

CVSS Score

Published: April 4, 2022 at 07:45 PM UTC

Updated: June 17, 2026 at 03:53 AM UTC

41 products affected across 1 vendorC0-11are D FirmwareC0-12dd1e 1-d FirmwareC0-10dd1e D Firmware

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

The programming protocol allows for a previously entered password and lock state to be read by an attacker. If the previously entered password was successful, the attacker can then use the password to unlock Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

C0-10are D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-10are-d (same device)

C0-10dd1e D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-10dd1e-d (same device)

C0-10dd2e D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-10dd2e-d (same device)

C0-10dre D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-10dre-d (same device)

C0-11are D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-11are-d (same device)

C0-11dd1e D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-11dd1e-d (same device)

C0-11dd2e D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-11dd2e-d (same device)

C0-11dre D Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-11dre-d (same device)

C0-12are 1-d Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-12are-1-d (same device)

C0-12are 2-d Firmware · Automationdirect

95%

v < 3.00

Affected range stops below 3.00, so it looks safe — our inference, not a vendor statement

automationdirect-c0-12are-2-d (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRMThird Party AdvisoryUS Government Resource

Source: [email protected]

https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHicscert

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-256CWE-522

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