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Sid 1-47495


FILE-OFFICE Microsoft Office Excel use after free attempt


This event is generated when an XLSX file that exploits the vulnerability outlined in CVE-2018-8379 is detected.


Remote code execution


CVSS base score 7.8

CVSS impact score 5.9

CVSS exploitability score 1.8

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

Use After Free CVE-2018-8379: A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka "Microsoft Excel Remote Code Execution Vulnerability." This affects Microsoft Excel. This CVE ID is unique from CVE-2018-8375.

Affected systems

  • microsoft excel 2010
  • microsoft excel 2013
  • microsoft excel 2016
  • microsoft excel2013rt sp1

Ease of attack


Access Vector

Access Complexity


False positives

False negatives

Corrective action


  • Cisco's Talos Intelligence Group

Additional References