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NCSC-VD-2601-001-02

Severity Level: High

Reference No.: NCSC-VD-2601-001-02

Microsoft

Description

CVE-2026-21509: A high-severity zero-day vulnerability in Microsoft Office allows unauthorized attackers to bypass security features in Microsoft Office by exploiting Object Linking and Embedding (OLE) mitigations.

Vulnerabilities

  • CVE-2026-21509

    A high-severity zero-day vulnerability in Microsoft Office allows unauthorized attackers to bypass security features in Microsoft Office by exploiting Object Linking and Embedding (OLE) mitigations.

References