---
id: CVE-2026-62882
title: Microsoft Outlook Spoofing Vulnerability
summary: >-
  Insufficiently protected credentials in Microsoft Office Outlook allows an
  unauthorized attacker to perform spoofing over a network.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-522
vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
affected:
  - '365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleases'
  - 'office_2019 >= 19.0.0 < https://aka.ms/OfficeSecurityReleases'
  - 'office_ltsc_2021 >= 16.0.1 < https://aka.ms/OfficeSecurityReleases'
  - 'office_ltsc_2024 >= 16.0.0 < https://aka.ms/OfficeSecurityReleases'
  - outlook_2016 >= 16.0.0.0 < 16.0.5565.1000
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-12T15:59:13.911178Z'
published: '2026-08-11'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:38:37.055Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62882'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62882'
    label: Microsoft Outlook Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00667
epssPercentile: 0.49774
ingestedAt: '2026-09-08T18:07:34.889Z'
---

## Overview

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleases`
- `office_2019 >= 19.0.0 < https://aka.ms/OfficeSecurityReleases`
- `office_ltsc_2021 >= 16.0.1 < https://aka.ms/OfficeSecurityReleases`
- `office_ltsc_2024 >= 16.0.0 < https://aka.ms/OfficeSecurityReleases`
- `outlook_2016 >= 16.0.0.0 < 16.0.5565.1000`

## Remediation

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