Sono state appena segnalate due vulnerabilità critiche per Excel e Publisher.
Si raccomanda l'update immediato della propria copia di Office:

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Bulletin Number: MS07-036
Maximum Severity: Critical
Affected Products: All currently supported versions of Microsoft Office
Impact: Remote Code Execution

MS07-036
Bulletin Title: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (936542)

Executive Summary: This critical update resolves one publicly disclosed
vulnerability and two privately reported vulnerabilities in addition to
other security issues identified during the course of the investigation.
These vulnerabilities could allow remote code execution if a user opens a
specially crafted Excel file. 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.
Affected Software: Office, Excel.

More information:
http://www.microsoft.com/technet/security/bulletin/MS07-036.mspx
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Bulletin Number: MS07-037
Maximum Severity: Important
Affected Products: Publisher 2007
Impact: Remote Code Execution

Bulletin Title: Vulnerability in Microsoft Office Publisher Could Allow Remote Code Execution (936548)


Executive Summary: This important security update resolves one publicly
disclosed vulnerability. This vulnerability could allow remote code
execution if a user viewed a specially crafted Microsoft Office Publisher
file. 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. User interaction is required to exploit this vulnerability.
Affected Software: Office, Publisher.

More information:
http://www.microsoft.com/technet/security/bulletin/MS07-037.mspx