CVE intelligence

CVE-2026-35420

Vulnerability intelligence

Published May 12, 2026Sources checked Nov 11, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-35420 and is rated High severity with a CVSS score of 7.8. 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: May 12, 2026

Vendor remediation details

Install KB5087538. Install KB5087545. Install KB5087424. Install KB5087539. Install KB5087423. Install KB5087541. Install KB5087537. Install KB5087470. Install KB5087471.

Vendor-listed releases

10.0.17763.8755
10.0.20348.5139
10.0.20348.5074
10.0.26100.32860
10.0.26100.32772
10.0.25398.2330
10.0.14393.9140
6.2.9200.26079
6.3.9600.23181

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-35420?

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Source: NVD