CVE intelligence

CVE-2026-45454

Vulnerability intelligence

Published Jun 9, 2026Sources checked Nov 12, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-45454 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: Jun 9, 2026

Install KB5002880. Install KB5002874. Install KB5002873.

Vendor-listed releases

16.0.5556.1005
16.0.10417.20153
16.0.19725.20384

CISA KEVNot listedBased on the latest collected catalog

EPSS1.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-45454?

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Source: NVD