Multiple integer signedness errors in the NTLM implementation in Atrium MERCUR IMAPD (mcrimap4.exe) 5.00.14, with SP4, allow remote attackers to execute arbitrary code via a long NTLMSSP argument that triggers a stack-based buffer overflow.
https://www.exploit-db.com/exploits/3527
https://exchange.xforce.ibmcloud.com/vulnerabilities/33120