CVE-2026-20937 Details
Description
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
A vulnerability in Windows File Explorer allows an authorized attacker to locally disclose sensitive information. This issue affects multiple Windows versions, including Windows 10, Windows 11, Windows Server 2016, Windows Server 2022, and Windows Server 2019. The vulnerability arises from the improper handling of addresses from objects operating at a high integrity level within a sandboxed execution environment, potentially exposing this information to unauthorized actors.
Users can apply the security update KB5073724 for Windows 10, KB5074109 for Windows 11, KB5073722 for Windows Server 2016, KB5073457 for Windows Server 2022, and KB5073723 for Windows Server 2019. Security Update KB5073379 is also available for Windows Server 2025. Instructions for downloading these security updates are available through the Microsoft Update Catalog.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20937 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1607 | < 10.0.14393.8783 |
CPE
Remediation
| |
| microsoft windows 10 1809 | < 10.0.17763.8276 |
CPE
Remediation
| |
| microsoft windows 10 21h2 | < 10.0.19044.6809 |
CPE
Remediation
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| microsoft windows 10 22h2 | < 10.0.19045.6809 |
CPE
Remediation
| |
| microsoft windows 11 23h2 | < 10.0.22631.6491 |
CPE
Remediation
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| microsoft windows 11 24h2 | < 10.0.26100.7623 |
CPE
Remediation
| |
| microsoft windows 11 25h2 | < 10.0.26200.7623 |
CPE
Remediation
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| microsoft windows server 2016 | < 10.0.14393.8783 |
CPE
Remediation
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| microsoft windows server 2019 | < 10.0.17763.8276 |
CPE
Remediation
| |
| microsoft windows server 2022 | < 10.0.20348.4648 |
CPE
Remediation
| |
| microsoft windows server 2022 23h2 | < 10.0.25398.2092 |
CPE
Remediation
| |
| microsoft windows server 2025 | < 10.0.26100.32230 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 16, 2026 | Initial Analysis | [email protected] |
| Jan 13, 2026 | New CVE Received | [email protected] |