published October 17, 2003
NVD has not assigned a CVSS score to this record. It sits in the 99.6th percentile for exploit probability.
The Internet Mail Service in Exchange Server 5.5 and Exchange 2000 allows remote attackers to cause a denial of service (memory exhaustion) by directly connecting to the SMTP service and sending a certain extended verb request, possibly triggering a buffer overflow in Exchange 2000.