Risk Letters

Exploited vulnerability

CVE-2009-0238

TLP:CLEAR

Microsoft Office Remote Code Execution

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.

Facts

  • Vendor: Microsoft
  • Product: Office
  • CVSS: 8.8
  • EPSS (probability of exploitation within 30 days): 42.9 %
  • On CISA's Known Exploited Vulnerabilities list since: 14 April 2026
  • First known exploitation: 14 April 2026
  • CISA's deadline for US federal agencies: 28 April 2026
  • Weakness: CWE-94
  • First seen by Risk Letters: 14 April 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD