In Omron CS series, CJ series, and CP series PLCs through 2022-05-18, the password for access to the Web UI is stored in memory area D1449…D1452 and can be read out using the Omron FINS protocol without any further authentication.
Weakness
The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sysmac_cs1_firmware | Omron | * | 4.1 (excluding) |