CVE-2026-97771

Microsoft Office Excel Remote Code Execution Vulnerability

CVE-2026-97771 is fixed in Office Online Server on 1 platform by KB5002928 (version ), released October 13, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0074

54th percentile

<p>Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Office Online Server		KB5002928	Oct 13, 2026

Details

Published
October 13, 2026
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97771

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