Microsoft has released emergency security updates to patch a high-severity Office zero-day vulnerability exploited in attacks ...

A "high risk" security vulnerability was found in numerous versions of Microsoft Office. You should install the provided emergency updates ASAP.

Microsoft's latest zero-day patch blocks a viral Office document hack - how to protect your PC ASAP ...

Microsoft suggests the threat is being used in phishing attacks against vulnerable systems since successful exploitation ...

Microsoft released out-of-band patches for an actively exploited Microsoft Office zero-day, CVE-2026-21509, a security ...

Microsoft has released an out-of-band emergency security update to address a zero-day vulnerability in Microsoft Office that is being actively exploited, extending support for affected versions ...

Microsoft releases an urgent out-of-band update for a critical Office zero-day flaw already exploited in real-world attacks.

Russia-linked hacking group Fancy Bear is exploiting a brand-new vulnerability in Microsoft Office, CERT-UA says ...

Ukraine's Computer Emergency Response Team (CERT) says that Russian hackers are exploiting CVE-2026-21509, a recently patched vulnerability in multiple versions of Microsoft Office.

Microsoft is warning admins of an Office security bypass zero day vulnerability that can be triggered simply by a user opening a document. The flaw is currently being actively exploited.

Microsoft released patches for CVE-2026-21509, a new Office zero-day vulnerability that can be exploited to bypass security ...

Microsoft forced to issue an emergency patch to fix an Office zero-day being actively exploited.