CVE-2026-108427 Microsoft Office Word - Remote Code Execution

Microsoft Office Word contains a heap-based buffer overflow caused by improper memory handling, letting unauthorized attackers execute code remotely, exploit requires network access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
15 October 2026
Updated
16 October 2026
Weakness
CWE-20

Vendor fix

Update to the latest version of Microsoft Office Word.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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