CVE intelligence

CVE-2026-118739

Vulnerability intelligence

Published Nov 10, 2026Sources checked Nov 10, 2026

6.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-118739 and is rated Medium severity with a CVSS score of 6.5. 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: Nov 10, 2026

Vendor remediation details

Install KB5121003. Install KB5120994. Install KB5120233. Install KB5120228. Install KB5121000.

Vendor-listed releases

10.0.26100.9168
10.0.26100.9106
10.0.26200.9168
10.0.26200.9106
10.0.26100.33296
10.0.26100.33222
10.0.28000.2704

CISA KEVNot listedBased on the latest collected catalog

EPSSUnavailableNo current score collected

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-118739?

Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.

Source: NVD