PT-2026-47950 · Microsoft · 365 Apps For Enterprise+8

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45463

NVD

CVSS v3.1

8.4

High

Base vector

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

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Fix

Integer Underflow

Stack Overflow

Weakness Enumeration

CWE-191

CWE-121

Related Identifiers

CVE-2026-45463

Affected Products

365 Apps For Enterprise

Office 2016

Office 2019

Office 365 For Mac

Office Ltsc 2021

Office Ltsc 2024

Office Ltsc For Mac 2021

Office Ltsc For Mac 2024

Office For Android

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45463 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45463 · Security Note