There's a zero day vulnerability (CVE-2020-0674) in Microsoft's Internet Explorer browser that is reportedly used for "limited targeted attacks." A vulnerability in the browser's scripting engine can result in memory corruption and allow an attacker to run arbitrary code.
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. 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. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website, for example, by sending an email.
The bug affects Internet Explorer 9, 10 and 11 on various supported versions of Windows. Despite the fact that the bug is actively exploited, Microsoft isn't planning to do an out-of-band update. The software giant explains on its website that a patch will be rolled out on February 11, the next Patch Tuesday. Mitigation techniques can be found at Microsoft's website. Alternatively, you can use a different browser like Chrome or Firefox.