CVE-2026-108446 Microsoft Office Excel - Remote Code Execution

Microsoft Office Excel contains a use after free vulnerability that allows unauthorized attackers to execute code over a network, 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
Use After Free
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-416

Vendor fix

Update to the latest version of Microsoft Office Excel.

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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