CVE-2026-20944: Microsoft Word Remote Code Execution Vulnerability

CVE-2026-20944 PUBLISHED CVSS 8.4 HIGH

Microsoft Word Remote Code Execution Vulnerability

Reported by microsoft · Published January 13, 2026

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
365_apps	microsoft	https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC for Mac 2021	Microsoft	16.105.26011018
Microsoft Office LTSC for Mac 2024	Microsoft	16.105.26011018
Microsoft 365 Apps for Enterprise	Microsoft	https://aka.ms/OfficeSecurityReleases

CVSS 3.1

8.4

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Vendor	Product	Versions
Microsoft	Microsoft 365 Apps for Enterprise	16.0.1
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0
microsoft	office_macos_2021	16.0.1
microsoft	365_apps	16.0.1
Microsoft	Microsoft 365 Apps for Enterprise	16.0.1
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1
microsoft	office_macos_2024	16.0.0

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-20944
vulnetix vdb fixes CVE-2026-20944

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-20944/fixes/registry"

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