Omron CX-One CX-Programmer before 9.6, CJ2M PLC devices before 2.1, and CJ2H PLC devices before 1.5 rely on cleartext password transmission, which allows remote attackers to obtain sensitive information by sniffing the network during a PLC unlock request.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0987
Reference (s):
- https://ics-cert.us-cert.gov/advisories/ICSA-15-274-01