All vulnerabilities
CVE-2026-108438

Microsoft Office Word Information Disclosure Vulnerability

Microsoft Microsoft 365 Apps for EnterpriseApplications & CMS
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.50%Chance of exploitation activity in the next 30 days, higher than 42% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in16.114.26101123Fixed versionCVE List
Published15 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 16.114.26101123Microsoft Office 365 for MacCVE List
  • 16.114.26101123Microsoft Office LTSC for Mac 2021CVE List
  • 16.114.26101123Microsoft Office LTSC for Mac 2024CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Vendor and government advisories 1

Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

Description

Use after free in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

Text from CVE List

Affected versions 4

  • Microsoft 365 Apps for Enterpriseaffected: 16.0.1 before https://aka.ms/OfficeSecurityReleasesCVE List
  • Microsoft Office 365 for Macaffected: 1.0.0 before 16.114.26101123CVE List
  • Microsoft Office LTSC for Mac 2021affected: 16.0.1 before 16.114.26101123CVE List
  • Microsoft Office LTSC for Mac 2024affected: 16.0.0 before 16.114.26101123CVE List

References 1