We are recommending EMET as a potential mitigation for possible attacks attempting to exploit this vulnerability. The Enhanced Mitigation Experience Toolkit (EMET) is a utility that helps prevent vulnerabilities in software from successfully being exploited by applying the latest mitigations to applications configured in EMET.
MS12-043 fully protects customers from attempts to exploit the issue in MSXML versions 3.0, 4.0 and 6.0; EMET provides an excellent mitigation against attempts to reach the vulnerability in MSXML 5.0.