CVE intelligence

CVE-2026-26154

Vulnerability intelligence

Published Apr 14, 2026Sources checked Nov 11, 2026

7.5HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-26154 and is rated High severity with a CVSS score of 7.5. 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: Apr 14, 2026

Vendor remediation details

Install KB5082123. Install KB5082142. Install KB5082063. Install KB5082060. Install KB5082198. Install KB5082127. Install KB5082126.

Vendor-listed releases

10.0.17763.8644
10.0.20348.5020
10.0.26100.32690
10.0.25398.2274
10.0.14393.9060
6.2.9200.26026
6.3.9600.23132

CISA KEVNot listedBased on the latest collected catalog

EPSS1.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-26154?

Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.

Source: NVD