CVE-2026-20805 Details
Description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
A vulnerability allowing information disclosure has been identified in the Desktop Window Manager component of Microsoft Windows. This issue allows an authorized attacker to locally disclose sensitive information, specifically user-mode memory addresses, through a remote ALPC port.
Users can apply the security update KB5073724 for Windows 10, KB5073722 for Windows Server 2016, KB5073696 for Windows Server 2012 R2, and KB5073457 for Windows Server 2022. For Windows 11, the security update KB5074109 is available for versions 24H2 and 25H2, both for x64 and ARM64-based systems. Windows Server 2025 also has a security update available. Instructions for downloading these updates can be found on 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 14, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805 | CISA-ADP | US Government Resource |
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805 | [email protected] | Vendor Advisory |
This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name | Date Added | Due Date | Required Action |
|---|---|---|---|
| Microsoft Windows Information Disclosure Vulnerability | Jan 13, 2026 | Feb 3, 2026 | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
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
| |
| microsoft windows 10 22h2 | < 10.0.19045.6809 |
CPE
Remediation
| |
| microsoft windows 11 23h2 | < 10.0.22631.6491 |
CPE
Remediation
| |
| microsoft windows 11 24h2 | < 10.0.26100.7623 |
CPE
Remediation
| |
| microsoft windows 11 25h2 | < 10.0.26200.7623 |
CPE
Remediation
| |
| microsoft windows server 2012 | r2 |
CPE
Remediation
| |
| microsoft windows server 2016 | < 10.0.14393.8783 |
CPE
Remediation
| |
| 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 | < 10.0.26100.7623 |
CPE
Remediation
| |
Change History
6 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 14, 2026 | Initial Analysis | [email protected] |
| Jan 13, 2026 | CVE Modified | CISA-ADP |
| Jan 13, 2026 | New CVE Received | [email protected] |