---
id: CVE-2026-62877
title: Windows Win32k Elevation of Privilege Vulnerability
summary: >-
  Stack-based buffer overflow in Windows Win32K allows an authorized attacker to
  elevate privileges locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-121
vendor: Microsoft
product: Microsoft Office 365 for Mac
affected:
  - office_365_for_mac >= 1.0.0 < 16.112.26090911
  - office_for_android >= 16.0.1 < 16.0.20430.20000
  - office_ltsc_for_mac_2021 >= 16.0.1 < 16.112.26090911
  - office_ltsc_for_mac_2024 >= 16.0.0 < 16.112.26090911
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-12T03:55:26.252100Z'
published: '2026-08-11'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T20:05:55.792Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62877'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62877'
    label: Windows Win32k Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00333
epssPercentile: 0.26611
ingestedAt: '2026-09-08T18:07:34.898Z'
---

## Overview

Stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.

## Affected

- `office_365_for_mac >= 1.0.0 < 16.112.26090911`
- `office_for_android >= 16.0.1 < 16.0.20430.20000`
- `office_ltsc_for_mac_2021 >= 16.0.1 < 16.112.26090911`
- `office_ltsc_for_mac_2024 >= 16.0.0 < 16.112.26090911`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.