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5.5

The CODESYS OPC DA Server prior V3.5.18.20 stores PLC passwords as plain text in its configuration file so that it is visible to all authorized Microsoft Windows users of the system.

CVE-2022-1794 · published 4 years ago
Summary

The CODESYS OPC DA Server prior V3.5.18.20 stores PLC passwords as plain text in its configuration file so that it is visible to all authorized Microsoft Windows users of the system.

What to do
  • Update codesys opc_da_server to version 3.5.18.20 or later.
Affected software
VendorProductAffected versions
codesys opc_da_server >= 3.0.0, < 3.5.18.20
cpe:2.3:a:codesys:opc_da_server:*:*:*:*:*:*:*:*
Original advisory text
The CODESYS OPC DA Server prior V3.5.18.20 stores PLC passwords as plain text in its configuration file so that it is visible to all authorized Microsoft Windows users of the system.
The CODESYS OPC DA Server prior V3.5.18.20 stores PLC passwords as plain text in its configuration file so that it is visible to all authorized Microsoft Windows users of the system.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-256Plaintext Storage of a Password
CWE-522Insufficiently Protected Credentials
Timeline
Published11 Jul 2022
Updated29 Oct 2026
First seen29 Sep 2026
Sources
CVE-2022-1794 · NVD
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