CVE-2026-97753

Microsoft Office Excel Remote Code Execution Vulnerability

CVE-2026-97753 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: Urgent.

Urgent

CVSS

8.8

Critical

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0080

56th percentile

<p>Heap-based buffer overflow 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
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97753

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