CVE intelligence and bounded remediation

CVE-2021-32986 — Automationdirect C0-10Dd1E-D Firmware security vulnerability

Critical CVSS 9.8

After Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00 is unlocked by an authorized user, the unlocked state does not timeout. If the programming software is interrupted, the PLC remains unlocked. All subsequent programming connections are allowed without authorization. The PLC is only relocked by a power cycle, or when the programming software disconnects correctly.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-04-04
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-288, CWE-863

Affected products

  • automationdirect / c0-10dd1e-d_firmware
  • automationdirect / c0-10dd2e-d_firmware
  • automationdirect / c0-10dre-d_firmware
  • automationdirect / c0-10are-d_firmware
  • automationdirect / c0-11dd1e-d_firmware
  • automationdirect / c0-11dd2e-d_firmware

Showing 6 representative product identities from 20 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.