CVE intelligence

CVE-2026-20823

Vulnerability intelligence

Published Jan 13, 2026Sources checked Sep 29, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-20823 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

Install KB5073723. Install KB5073457. Install KB5073724. Install KB5073379. Install KB5074109. Install KB5073455. Install KB5073450. Install KB5073722.

Vendor-listed releases

10.0.17763.8276
10.0.20348.4648
10.0.19044.6809
10.0.19045.6809
10.0.26100.32230
10.0.26200.7623
10.0.22631.6491
10.0.25398.2092
10.0.26100.7623
10.0.14393.8783

CISA KEVNot listedBased on the latest collected catalog

EPSS0.7%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-20823?

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.