CVE intelligence

CVE-2026-97777

Vulnerability intelligence

Published Oct 13, 2026Sources checked Oct 21, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-97777 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Oct 16, 2026

Vendor remediation details

Release Notes Install KB5002928.

Vendor-listed releases

16.114.26101123
16.0.14334.20974
16.0.17932.21056
https://aka.ms/OfficeSecurityReleases
16.0.10417.20228

CISA KEVNot listedBased on the latest collected catalog

EPSS0.7%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-97777?

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Source: NVD