PT-2026-47946 · Microsoft · 365 Apps For Enterprise+4

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45459

NVD

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

CVE-2026-45459

Affected Products

365 Apps For Enterprise

Office 365 For Mac

Office Ltsc 2024

Office Ltsc For Mac 2021

Office Ltsc For Mac 2024

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45459 · Security Note