Microsoft Excel Malformed String Remote Code Execution Vulnerability

ID SMNTC-21877
Type symantec
Reporter Symantec Security Response
Modified 2007-01-09T00:00:00



Microsoft Excel is prone to a remote code-execution vulnerability. Attackers can exploit this issue to execute arbitrary code with the privileges of the user running the affected application, which could result in the compromise of affected computers.

Technologies Affected

  • Microsoft Excel 2000
  • Microsoft Excel 2000 SP2
  • Microsoft Excel 2000 SP3
  • Microsoft Excel 2002
  • Microsoft Excel 2002 SP1
  • Microsoft Excel 2002 SP2
  • Microsoft Excel 2002 SP3
  • Microsoft Excel 2003
  • Microsoft Excel 2003 SP1
  • Microsoft Excel 2003 SP2
  • Microsoft Excel 2004 for Mac
  • Microsoft Excel
  • Microsoft Excel Viewer 2003
  • Microsoft Excel x for Mac
  • Microsoft Office 2000
  • Microsoft Office 2000 SP1
  • Microsoft Office 2000 SP2
  • Microsoft Office 2000 SP3
  • Microsoft Office 2003
  • Microsoft Office 2003 SP1
  • Microsoft Office 2003 SP2
  • Microsoft Office XP
  • Microsoft Office XP SP1
  • Microsoft Office XP SP2
  • Microsoft Office XP SP3
  • Microsoft Works Suite 2004
  • Microsoft Works Suite 2005
  • Microsoft Works Suite 2006


Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run non-administrative software as an unprivileged user with minimal access rights.

Do not accept or execute files from untrusted or unknown sources.
Users should not accept or execute files from unknown or untrusted sources.

Microsoft has released a fix to address this issue. Please see the references section for more information. Update: Microsoft has re-released MS07-002 to resolve a regression with the original Excel 2000 fixes when dealing with files created when in Korean, Chinese, or Japanese executable modes. Please see the knowledge base article (KB931183) for further information.