CVE-2006-3250

Heap-based buffer overflow in Windows Live Messenger 8.0 allows user-assisted attackers to execute arbitrary code via a crafted Contact List (.ctt) file, which triggers the overflow when it is imported by the user.

CVE-2006-6252

Microsoft Windows Live Messenger 8.0 and earlier, when gestual emoticons are enabled, allows remote attackers to cause a denial of service (CPU consumption) via a long string composed of ":D" sequences, which are interpreted as emoticons.