CVE-2003-1326: Microsoft Internet Explorer 5.5 and 6.0 allows remote attackers to bypass the cross-domain security model t...

Security readout for executives and security teams

This vulnerability lets a malicious website abuse Internet Explorer dialog behavior to cross a browser security boundary. For affected IE 5.5 and 6.0 systems, that could allow malicious script or arbitrary programs to run. The sources do not provide CVSS scoring or current exploitation evidence. Exposure is most likely limited to legacy environments still running Microsoft Internet Explorer 5.5 or 6.0, including embedded, isolated, or unmanaged Windows systems. The supplied affected-product metadata is incomplete, so inventories should key off browser version and MS03-004 applicability. Treat this as high priority only if legacy IE 5.5 or 6.0 remains in use. For most modern environments, priority is inventory confirmation and exception cleanup rather than emergency response. Mitigation focus: Identify and remove Internet Explorer 5.5 and 6.0 from active use.; Review Microsoft MS03-004 and apply applicable vendor updates or replacement guidance.; Isolate systems that cannot be upgraded from web and email browsing paths..

Prepared

Jun 30, 2026, 03:02 UTC (UTC+00:00)

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