Vulnerability Spotlight: Remote code execution vulnerability in Microsoft Excel
Summary: Cisco Talos discovered a remote code execution vulnerability in Microsoft Excel, disclosed by Microsoft in its monthly security update. The flaw is a use-after-free in mso.dll, in the component handling the "Microsoft Office HTML and XML" format introduced in Office 2000, and a specially crafted XLS file provided to a victim can trigger it.
What you should know: Exploitation requires only that a victim open a malformed XLS file, so a single attachment reaching an inbox is enough to hand an attacker remote code execution on the host.
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