CVE intelligence

CVE-2026-21246

Vulnerability intelligence

Published Feb 10, 2026Sources checked Oct 3, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-21246 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

Install KB5075904. Install KB5075906. Install KB5075943. Install KB5075912. Install KB5075899. Install KB5075942. Install KB5077181. Install KB5077212. Install KB5075941. Install KB5075897. Install KB5075999. Install KB5075971. Install KB5075970.

Vendor-listed releases

10.0.17763.8389
10.0.20348.4773
10.0.20348.4711
10.0.19044.6937
10.0.19045.6937
10.0.26100.32370
10.0.26100.32313
10.0.26200.7840
10.0.26200.7781
10.0.22631.6649
10.0.25398.2149
10.0.26100.7840
10.0.26100.7781
10.0.14393.8868
6.2.9200.25923
6.3.9600.23022

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-2026-21246?

Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.