CVE intelligence

CVE-2026-121681

Vulnerability intelligence

Published Nov 10, 2026Sources checked Nov 10, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-121681 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: Nov 10, 2026

Vendor remediation details

Install KB5127648. Install KB5131080. Install KB5127646.

Vendor-listed releases

10.0.26100.9711
10.0.26200.9711
10.0.26300.9711
10.0.26100.33822
10.0.28000.3231

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-2026-121681?

Heap-based buffer overflow in Microsoft Trace Data Helper allows an authorized attacker to elevate privileges locally.

Source: NVD