Microsoft today announced of re-releasing MS11-018. If you are using Internet Explorer 7 on supported editions of Windows XP and Windows Server 2003 you may be offered this re-release.
"This security update resolves four privately reported vulnerabilities and one publicly disclosed vulnerability in Internet Explorer. This security update is rated Critical for Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows clients; and Moderate for Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows servers. Internet Explorer 9 is not affected by the vulnerabilities. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
The update addresses the vulnerabilities by modifying the way that Internet Explorer handles objects in memory, content during certain processes, and script during certain processes. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information," explains Microsoft MS11-018 bulletin.
[Source: MSRC blog]