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Sid 1-47747


BROWSER-IE Microsoft Internet Explorer MSXML use after free attempt


This event is generated when Microsoft Internet Explorer MSXML use after free attempt.


Attempted User Privilege Gain


CVSS base score 8.8

CVSS impact score 5.9

CVSS exploitability score 2.8

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

CVE-2018-8420: A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input, aka "MS XML Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Affected systems

  • microsoft windows_10 -
  • microsoft windows_10 1607
  • microsoft windows_10 1703
  • microsoft windows_10 1709
  • microsoft windows_10 1803
  • microsoft windows_7 -
  • microsoft windows_8.1 -
  • microsoft windows_server 2008
  • microsoft windows_server 2012
  • microsoft windows_server 2016

Ease of attack


Access Vector

Access Complexity


False positives

False negatives

Corrective action


  • Cisco's Talos Intelligence Group

Additional References