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CVE record · CVE-2026-44821

Microsoft Office Information Disclosure Vulnerability

CVSS 5.5 MediumEPSS 0.0046 · 40th percentile

Published by the CVE Program (CNA: microsoft) at 9 Jun 2026, 17:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft 365 Apps for Enterprise
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office 2016
  • affected 16.0.0 to before 16.0.5556.1005 custom
Microsoft Microsoft Office 2019
  • affected 19.0.0 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office 365 for Mac
  • affected 1.0.0 to before 16.110.26061317 custom
Microsoft Microsoft Office LTSC 2021
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office LTSC 2024
  • affected 16.0.0 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office LTSC for Mac 2021
  • affected 16.0.1 to before 16.110.26061317 custom
Microsoft Microsoft Office LTSC for Mac 2024
  • affected 16.0.0 to before 16.110.26061317 custom
Microsoft Microsoft SharePoint Enterprise Server 2016
  • affected 16.0.0 to before 16.0.5556.1005 custom
Microsoft Microsoft SharePoint Server 2019
  • affected 16.0.0 to before 16.0.10417.20153 custom
Microsoft Microsoft SharePoint Server Subscription Edition
  • affected 16.0.0 to before 16.0.19725.20384 custom
Identifiers
CVE-2026-44821
CNA
microsoft
Weakness (CWE)
CWE-125
Tags
Published
9 Jun 2026
Updated
24 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.5 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.0046, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 9 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.