PT-2026-47942 · Microsoft · 365 Apps For Enterprise+8

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45455

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

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-45455

Affected Products

365 Apps For Enterprise

Excel 2016

Office 2019

Office 365 For Mac

Office Ltsc 2021

Office Ltsc 2024

Office Ltsc For Mac 2021

Office Ltsc For Mac 2024

Office Online Server

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45455 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45455 · Security Note