Buffer overflow in the HTML Converter (HTML32.cnv) on various Windows operating systems allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via cut-and-paste operation, as demonstrated in Internet Explorer 5.0 using a long "align" argument in an HR tag.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-023
http://www.securityfocus.com/bid/8016
http://www.kb.cert.org/vuls/id/823260
http://www.cert.org/advisories/CA-2003-14.html
http://marc.info/?l=bugtraq&m=105639925122961&w=2
http://lists.grok.org.uk/pipermail/full-disclosure/2003-June/006067.html
http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006155.html