The SMB client in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote SMB servers to execute arbitrary code via a crafted (1) SMBv1 or (2) SMBv2 response, aka "SMB Response Parsing Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12746
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-043