Microsoft has issued a security advisory for Internet Explorer, after a research firm published a working exploit to demonstrate how attackers could take advantage of the flaw.

The vulnerability, discovered by SEC Consult, mean that attackers could cause the browser to unexpectedly exit and execute arbitrary code. Versions of IE affected by the flaw include IE 6.0 on Windows 2000 with Service Pack 1, 3 and 4, and on Windows XP with Service Pack 1 and 2.

“Microsoft is investigating a new public report of a vulnerability affecting Internet Explorer. We have not been made aware of any attacks attempting to use the reported vulnerability or customer impact at this time,” Microsoft said Thursday in its advisory. “But we are aggressively investigating the public report.”

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