The Internet Explorer zero-day, tracked as CVE-2019-1367, has been described as a memory corruption issue that allows remote code execution. The security hole affects Internet Explorer 9, 10 and 11, and Microsoft says it’s aware of exploitation attempts against both newer and older versions.
“The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system,” Microsoft said in an advisory.