---
id: CVE-2026-68798
title: Microsoft Excel Remote Code Execution Vulnerability
summary: >-
  Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized
  attacker to execute code locally.
severity: high
cvss: 7.8
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-122
vendor: Microsoft
product: Microsoft Office 365 for Mac
affected:
  - office_365_for_mac >= 1.0.0 < 16.112.26081010
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-07T00:00:00+00:00'
published: '2026-08-11'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T20:54:44.186Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68798'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68798'
    label: Microsoft Excel Remote Code Execution Vulnerability
tags:
  - cve.org
epss: 0.00466
epssPercentile: 0.40212
ingestedAt: '2026-09-08T18:07:34.888Z'
---

## Overview

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

## Affected

- `office_365_for_mac >= 1.0.0 < 16.112.26081010`

## Remediation

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