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entry for Security Update for Windows XP (KB919007)
. This security update for Windows XP addresses a vulnerability in Pragmatic General Multicast (PGM) that could allow remote code execution.There is a remote code execution vulnerability that could allow an attacker to send a specially crafted multicast message to an affected system and execute code on the affected system. The MSMQ service, which is the Windows service needed to allow PGM communications is not installed by default.