The ACMELOGIN implementation in HP OpenVMS 8.3 and 8.4 on the Alpha platform, and 8.3, 8.3-1H1, and 8.4 on the Itanium platform, when the SYS$ACM system service is enabled, allows local users to gain privileges via unspecified vectors.
https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03333494
https://exchange.xforce.ibmcloud.com/vulnerabilities/75729
http://www.securitytracker.com/id?1027074