Critical Analysis: CVE-2010-0249 - Microsoft Internet Explorer Use-After-Free Vulnerability... — June 7, 2026

Published 07 Jun 2026 · vulnerability management, CVE analysis, threat intelligence, security operations, cybersecurity news

Initial Discovery and Context Diving into CVE-2010-0249, a vulnerability that, even fifteen years after its initial announcement, still offers some crucial architectural takeaways, especially when we consider the enduring design patterns of web browsers and the persistent struggle with memory safety. This particular flaw, a Microsoft Internet Explorer Use-After-Free (UAF) in the HTML rendering engine, specifically within the CMarkup::RemoveElement method, was initially disclosed in early 2010. It targeted IE6, IE7, and IE8 on various Windows platforms, from XP all the way up to Windows 7 and Server 2008 R2. At the time, IE’s market share was still significant, making this an extremely high-impact vulnerability. What made this particularly nasty was its remote code execution (RCE) capability, triggered merely by visiting a specially crafted web page. It wasn't just a nuisance; it was a fo