Icon of program: Microsoft Exchange 5.5 Ou…

Microsoft Exchange 5.5 Outlook Web Access Patch for Windows

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Used Microsoft Exchange 5.5 Outlook Web Access Patch for Windows?

Editors’ Review

Download.com staff
Microsoft's Outlook Web Access (OWA) service for Exchange Server has a critical security flaw. Scripts in attachments can execute, potentially compromising user mailboxes.

  • Pros

    • Web browser access to Exchange mailbox
    • Service for Exchange 5.5 and 2000 Server

  • Cons

    • Script execution from HTML attachments
    • Potential for mailbox compromise
    • Requires scripting enabled in OWA zone
Icon of program: Microsoft Exchange 5.5 Ou…

Microsoft Exchange 5.5 Outlook Web Access Patch for Windows

Download now

Used Microsoft Exchange 5.5 Outlook Web Access Patch for Windows?

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Full Specifications

GENERAL
Release
Latest update
Version
2655.77
OPERATING SYSTEMS
Platform
Windows
Operating System
  • Windows 10
  • Windows NT
  • Windows 2000
Additional Requirements
Windows NT/2000, Microsoft Exchange 5.5 SP4
POPULARITY
Total Downloads
19,527
Downloads Last Week
1
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User Reviews

5/5

1 User Votes

Developer’s Description

By Microsoft
Resolve problems found in the Exchange 5.5 Web Client.
OWA is a service of Exchange 5.5 and 2000 Server that allows users to use a Web browser to access their Exchange mailbox. However, a flaw exists in the interaction between OWA and IE for message attachments. If an attachment contains HTML code including script, the script will be executed when the attachment is opened, regardless of the attachment type. Because OWA requires that scripting be enabled in the zone where the OWA server is located, this script could take action against the user's Exchange mailbox. An attacker could use this flaw to construct an attachment containing malicious script code. The attacker could then send the attachment in a message to the user.
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