Microsoft Internet Explorer MHTMLFile ActiveX object denial of service

ie-mhtmlfile-dos (27761) The risk level is classified as MediumMedium Risk


Microsoft Internet Explorer is vulnerable to a denial of service, caused by a NULL pointer dereference that can occur when processing a malformed MHTMLFile ActiveX object with the "location" or "URL" property set. A remote attacker could exploit this vulnerability to cause a victim's browser to crash, if the attacker could persuade the victim to visit a malicious Web page.


Base Score: 3.5
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
Temporal Score: 2.8
  Exploitability: Unproven
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated


Denial of Service


No remedy available as of September 1, 2014.


  • Browser Fun Blog Sunday, July 16, 2006: MoBB #16: MHTMLFile Location .
  • BID-19013: Microsoft Internet Explorer MHTMLFile Denial Of Service Vulnerability
  • CVE-2006-3659: Microsoft Internet Explorer 6 allows remote attackers to cause a denial of service (crash) by setting the location or URL property of a MHTMLFile ActiveX object.
  • OSVDB ID: 27108: Microsoft IE MHTMLFile Multiple Property NULL Dereference

Platforms Affected:

  • Microsoft Internet Explorer 6.0
  • Microsoft Internet Explorer 6.0 SP2
  • Microsoft Internet Explorer 6.0 SP1


Jul 16, 2006

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