Microsoft Office Remote Code Execution

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• NewsExploited · CISA KEVMicrosoft · Office

  Microsoft Office Remote Code Execution

  CVE-2009-0238

  Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.

  CISA's required action · due 28 Apr 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: learn.microsoft.com · nvd.nist.gov

  Added to KEV 14 Apr 2026 · Source checked 4 Nov 2026, 16:35 UTC · CISA KEV entry

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