Security readout for executives and security teams
Plain-English summary
This flaw can expose CLICK PLC passwords because affected firmware sends them in clear text during unlock and project-transfer operations. Anyone with visibility to that network path could observe credentials and later access protected PLC functions. The main business concern is credential disclosure in operational technology environments, not direct remote code execution.
Executive priority
Treat this as a high-priority OT credential exposure issue. It is most urgent where PLC engineering networks are flat, shared, or reachable by many users, because password disclosure could enable later unauthorized changes even though the CVE itself is confidentiality-focused.
Technical view
CVE-2021-32982 is CWE-319 in Automation Direct CLICK PLC C0-1x CPU modules with firmware prior to v3.00. The vulnerability is network-exploitable with low complexity and no privileges or user interaction, but its scored impact is confidentiality only: CVSS 3.1 7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Likely exposure
Exposure is likely limited to environments using Automation Direct CLICK PLC C0-1x CPUs on firmware before v3.00, especially where engineering workstations, PLCs, or project-transfer traffic share observable networks.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Practical abuse requires network visibility during password exchange events, such as unlocking or project transfers, so risk depends heavily on OT network segmentation and monitoring.
Researcher notes
Evidence supports cleartext password exposure for affected CLICK C0-1x firmware before v3.00. The provided sources do not establish active exploitation, public weaponization, or broader affected product lines. Avoid assuming impact beyond credential observation unless additional vendor evidence is obtained.
Mitigation direction
- Inventory CLICK PLC C0-1x CPUs and record firmware versions.
- Prioritize firmware below v3.00 for vendor-guided update planning.
- Follow Automation Direct and CISA advisory guidance before production changes.
- Restrict PLC engineering traffic to trusted, segmented management paths.
- Rotate affected PLC passwords after exposure is remediated.
- Monitor for unexpected unlock or project-transfer activity.
Validation and detection
- Confirm whether any C0-1x CPUs run firmware prior to v3.00.
- Map which hosts can observe PLC engineering and transfer traffic.
- Review OT change records for recent unlocks or project transfers.
- Check whether PLC networks are segmented from general corporate users.
- Validate remediation in a maintenance window using approved procedures.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-319: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32982 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-166-02CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Cleartext Transmission of Sensitive Information
Cleartext Transmission of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.