CyberICT

CVE-2026-77898

Microsoft · Published September 8, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Microsoft Office Remote Code Execution Vulnerability. Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.

Affected Products

  • Microsoft Office LTSC 2024 for 32-bit editions
  • Microsoft Office LTSC 2021 for 64-bit editions
  • Microsoft Office LTSC 2021 for 32-bit editions
  • Microsoft Office 2019 for 64-bit editions

CVSS Vector

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