Security readout for executives and security teams
A flaw in Internet Explorer 5.01's WebBrowser control let a malicious website peek across frame boundaries it should not have been able to cross. In practice, a booby-trapped page could read information from a different site loaded in an IFRAME, undermining a core browser trust boundary. The issue is more than 25 years old and affects a long-obsolete browser. Exposure is limited to systems still running Internet Explorer 5.01 or embedding its WebBrowser control. Modern, supported Windows environments are not affected, and IE itself is retired. Any residual exposure lives in legacy kiosks, industrial HMIs, or archived VMs that still render web content with this component. Very low priority for any modern enterprise. Treat as a legacy hygiene item: confirm no production system still relies on Internet Explorer 5.01 or its embedded WebBrowser control, and fold remediation into normal end-of-life retirement rather than emergency patching. Mitigation focus: Retire or isolate any host still running Internet Explorer 5.01 or embedded WebBrowser controls.; Move legacy web apps to a supported, sandboxed browser or modern WebView.; Consult Microsoft legacy advisories for the last available IE cumulative updates..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2000-0503 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
Products and packages named in the record
CWE details
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