Back to vendor advisories
Microsoft Security Response CenterCVE-2026-62882

Microsoft Outlook Spoofing Vulnerability

HighVendor CVSS 4.3 / 10 1 CVE Published Aug 11, 2026 at 7:00 AM UTC

Summary

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

Products covered

  • Microsoft Office 2019 for 32-bit editions

  • Microsoft Office 2019 for 64-bit editions

  • Microsoft 365 Apps for Enterprise for 32-bit Systems

  • Microsoft 365 Apps for Enterprise for 64-bit Systems

  • Microsoft Office LTSC 2021 for 64-bit editions

  • Microsoft Office LTSC 2021 for 32-bit editions

  • Microsoft Office LTSC 2024 for 32-bit editions

  • Microsoft Office LTSC 2024 for 64-bit editions

Show 2 more products
  • Microsoft Outlook 2016 (32-bit edition)

  • Microsoft Outlook 2016 (64-bit edition)

Remediation

Click to Run Install KB5002755.

Vendor-listed fixes

  • https://aka.ms/OfficeSecurityReleases

  • 16.0.5565.1000

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.