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Microsoft Office Security Feature Bypass Vulnerability

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA catalog record

Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.

Product
Office
Added to KEV
26 Jan 2026
Federal remediation due
16 Feb 2026
Known ransomware use
Not reported
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