Security readout for executives and security teams
Plain-English summary
CODESYS OPC DA Server before V3.5.18.20 can leave PLC passwords stored in plain text. Any authorized Windows user on that system could view them, creating a credential exposure risk for connected industrial control environments.
Executive priority
Prioritize remediation for OT environments where the host is shared or broadly accessible. The bug is not remotely exploitable by itself, but exposed PLC credentials can undermine segmentation and access control.
Technical view
This is CWE-256 plaintext password storage in CODESYS OPC DA Server V3 prior to V3.5.18.20. The CVSS vector is local, low complexity, low privileges, no user interaction, with high confidentiality impact and no stated integrity or availability impact.
Likely exposure
Exposure is likely limited to Windows hosts running affected CODESYS OPC DA Server versions where multiple authorized users or accounts can access the system. Environments using shared engineering workstations or broadly accessible server hosts should treat this as higher priority.
Exploitation context
The sources do not report active exploitation, and this CVE is not listed as KEV. Abuse requires local authorized Windows access, but the exposed information may enable later unauthorized PLC access if passwords are reused or still valid.
Researcher notes
Treat this as a local credential disclosure issue with downstream operational risk. Evidence supports affected CODESYS OPC DA Server V3 prior to V3.5.18.20 only; no source here names other affected products or exploitation in the wild.
Mitigation direction
- Upgrade CODESYS OPC DA Server to V3.5.18.20 or later.
- Review the CODESYS advisory for vendor-specific remediation guidance.
- Limit authorized Windows access to affected OPC DA Server hosts.
- Rotate exposed PLC passwords after remediation.
- Review shared accounts and remove unnecessary local access.
Validation and detection
- Inventory CODESYS OPC DA Server versions on Windows hosts.
- Identify any installations earlier than V3.5.18.20.
- Confirm who has authorized Windows access to affected systems.
- Verify remediated systems no longer expose PLC passwords in plaintext.
- Check whether exposed PLC passwords remain valid or reused.
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
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CWE-256: Exact CWE lookup
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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-2022-1794 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17129&token=1c1485c4a700c04f2069699f5be7558d276ca117&download=CVE 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.
Plaintext Storage of a Password
Plaintext Storage of a Password represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.