The SMB client implementation in Microsoft Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP2 does not properly validate response fields, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted response, aka "SMB Client Pool Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8278
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-006