Siemens Simatic WinCC and PCS 7 SCADA system uses a hard-coded password, which allows local users to access a back-end database and gain privileges, as demonstrated in the wild in July 2010 by the Stuxnet worm, a different vulnerability than CVE-2010-2568.
https://exchange.xforce.ibmcloud.com/vulnerabilities/60587
http://www.wired.com/threatlevel/2010/07/siemens-scada/