Triangle MicroWorks SCADA Data Gateway before 3.00.0635 allows remote attackers to cause a denial of service (excessive data processing) via a crafted DNP3 packet.
https://www.cisa.gov/news-events/ics-advisories/icsa-14-149-01
http://www.trianglemicroworks.com/products/scada-data-gateway/what%27s-new