CVE-2003-0233: Heap-based buffer overflow in plugin.ocx for Internet Explorer 5.01, 5.5 and 6.0 allows remote attackers to...

Security readout for executives and security teams

CVE-2003-0233 is an old Internet Explorer plugin.ocx flaw that could let a remote attacker run code if a vulnerable IE 5.01, 5.5, or 6.0 system processes malicious use of the Load() method. Business risk is mainly legacy exposure, not modern browsers. Exposure is most likely on legacy systems still using Internet Explorer 5.01, 5.5, or 6.0 with plugin.ocx present. Current enterprise desktops are unlikely to be exposed unless old applications, kiosks, lab systems, or unsupported images remain. Prioritize this only if the organization still operates very old Internet Explorer environments. For normal modern fleets, urgency is low; for legacy regulated, kiosk, or industrial workstations, remediation or isolation should be tracked as a high-risk legacy exposure. Mitigation focus: Identify any remaining IE 5.01, 5.5, or 6.0 systems.; Review and apply Microsoft MS03-015 vendor guidance where applicable.; Retire or isolate unsupported legacy browser hosts..

Prepared

Jun 30, 2026, 11:12 UTC (UTC+00:00)

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