CVE-2023-0811 (published 2023-03-16T17:41:25.525Z)

Omron CJ1M unit v4.0 and prior has improper access controls on the memory region where the UM password is stored. If an adversary issues a PROGRAM AREA WRITE command to a specific memory region, they could overwrite the password. This may lead to disabling UM protections or setting a non-ASCII password (non-keyboard characters) and preventing an engineer from viewing or modifying the user program. 


Affected products: Vendor: Omron 
Product: CJ1M SYSMAC CJ-series
Versions: All versions