CVE intelligence

CVE-2026-45459

Vulnerability intelligence

Published Jun 9, 2026Sources checked Nov 12, 2026

3.3LOWCVSS out of 10

What this means

Review the available evidence

CVE-2026-45459 and is rated Low severity with a CVSS score of 3.3. 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: Jun 19, 2026

Click to Run Release Notes

Vendor-listed releases

https://aka.ms/OfficeSecurityReleases
16.110.26061317

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-45459?

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

Source: NVD