CVE intelligence

CVE-2026-83907

Vulnerability intelligence

Published Oct 13, 2026Sources checked Oct 21, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-83907 and is rated Medium severity with a CVSS score of 5.5. 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: Oct 13, 2026

Vendor remediation details

Install KB5126657. Install KB5127648. Install KB5126653. Install KB5127646.

Vendor-listed releases

10.0.19044.7807
10.0.19045.7807
10.0.26200.9711
10.0.22631.7652
10.0.26100.9711
10.0.28000.3231
10.0.26300.9711

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-83907?

Exposure of sensitive system information to an unauthorized control sphere in Windows Hello allows an authorized attacker to disclose information locally.

Source: NVD