CyberICT

CVE-2026-40360

Microsoft · Published May 12, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Microsoft Excel Information Disclosure Vulnerability. Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Affected Products

  • Office Online Server
  • Microsoft Office 2019 for 32-bit editions
  • Microsoft Office 2019 for 64-bit editions
  • Microsoft 365 Apps for Enterprise for 32-bit Systems

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C