The SNMPc Server (crserv.exe) process in Castle Rock Computing SNMPc before 7.0.19 allows remote attackers to cause a denial of service (crash) via a crafted packet to port 165/TCP.
https://www.exploit-db.com/exploits/4033
https://exchange.xforce.ibmcloud.com/vulnerabilities/34725
http://www.securityfocus.com/bid/24292