CVE-2005-0056: Internet Explorer 5.01, 5.5, and 6 does not properly validate certain URLs in Channel Definition Format (CD...

Security readout for executives and security teams

This is an old Internet Explorer flaw in how Channel Definition Format files are handled. A malicious remote source could use specially crafted CDF content to read sensitive information across domains or run code. It matters mainly where legacy Internet Explorer 5.01, 5.5, or 6 still exists. Exposure is likely limited to legacy Windows environments, embedded systems, kiosk systems, or archived virtual machines that still use Internet Explorer 5.01, 5.5, or 6 and can process CDF content. Treat this as high priority only if legacy Internet Explorer remains in production or operational technology. Modern environments without these versions have low practical exposure, but unmanaged legacy systems should be remediated or isolated promptly. Mitigation focus: Apply the Microsoft MS05-014 security update where affected Internet Explorer versions remain in use.; Retire or isolate systems requiring Internet Explorer 5.01, 5.5, or 6.; Restrict legacy browser access to untrusted web or CDF content..

Prepared

Jun 30, 2026, 01:08 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.