Innominate mGuard with firmware before 7.6.6 and 8.x before 8.1.4 allows remote authenticated admins to obtain root privileges by changing a PPP configuration setting.
https://www.cisa.gov/news-events/ics-advisories/icsa-14-352-02
https://ics-cert.us-cert.gov/advisories/ICSA-14-352-02
http://www.innominate.com/data/downloads/software/innominate_security_advisory_20141217_001_en.pdf