The Microsoft Windows security updates for July 2004 address newly discovered issues in Windows, including Microsoft Internet Explorer and Microsoft Outlook Express, both components of Windows.
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Cumulative Security Update for Outlook Express (823353)

View: Microsoft Security Bulletin MS04-018
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Vulnerability in Utility Manager Could Allow Code Execution (842526)

View: Microsoft Security Bulletin MS04-019
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Vulnerability in POSIX Could Allow Code Execution (841872)

View: Microsoft Security Bulletin MS04-020
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Security Update for IIS 4.0 (841373)

View: Microsoft Security Bulletin MS04-021
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Vulnerability in Task Scheduler Could Allow Code Execution (841873)

View: Microsoft Security Bulletin MS04-022
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Vulnerability in HTML Help Could Allow Code Execution (840315)

View: Microsoft Security Bulletin MS04-023
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Vulnerability in Windows Shell Could Allow Remote Code Execution (839645)

View: Microsoft Security Bulletin MS04-024
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Note: the above updates are also available via Windows Update

News source: Microsoft Security