---
id: "CVE-2026-20805"
kind: "vulnerability"
aliases: ["CVE-2026-20805"]
title: "Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker\u2026"
severity: "medium"
cvss: 5.5
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.8783"], "affected": "< 10.0.14393.8783", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.8276"], "affected": "< 10.0.17763.8276", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.6809"], "affected": "< 10.0.19044.6809", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.6809"], "affected": "< 10.0.19045.6809", "ecosystem": "vendor"}, {"name": "microsoft windows 11 23h2", "fixed": ["10.0.22631.6491"], "affected": "< 10.0.22631.6491", "ecosystem": "vendor"}, {"name": "microsoft windows 11 24h2", "fixed": ["10.0.26100.7623"], "affected": "< 10.0.26100.7623", "ecosystem": "vendor"}, {"name": "microsoft windows 11 25h2", "fixed": ["10.0.26200.7623"], "affected": "< 10.0.26200.7623", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.8783"], "affected": "< 10.0.14393.8783", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.8276"], "affected": "< 10.0.17763.8276", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.4648"], "affected": "< 10.0.20348.4648", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022 23h2", "fixed": ["10.0.25398.2092"], "affected": "< 10.0.25398.2092", "ecosystem": "vendor"}, {"name": "microsoft windows server 2025", "fixed": ["10.0.26100.7623"], "affected": "< 10.0.26100.7623", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "self-hosted", "windows"]
not_affected_if: ["non-windows"]
published_at: "2026-01-13T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20805", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20805", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker…

Microsoft Windows Desktop Window Manager has an information disclosure bug that lets an authorized local user read data they should not see. CISA lists it as actively exploited, so attackers are using it in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1607 affected < 10.0.14393.8783 fixed 10.0.14393.8783
- vendor:microsoft windows 10 1809 affected < 10.0.17763.8276 fixed 10.0.17763.8276
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.6809 fixed 10.0.19044.6809
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.6809 fixed 10.0.19045.6809
- vendor:microsoft windows 11 23h2 affected < 10.0.22631.6491 fixed 10.0.22631.6491
- vendor:microsoft windows 11 24h2 affected < 10.0.26100.7623 fixed 10.0.26100.7623
- vendor:microsoft windows 11 25h2 affected < 10.0.26200.7623 fixed 10.0.26200.7623
- vendor:microsoft windows server 2012 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected < 10.0.14393.8783 fixed 10.0.14393.8783
- vendor:microsoft windows server 2019 affected < 10.0.17763.8276 fixed 10.0.17763.8276
- vendor:microsoft windows server 2022 affected < 10.0.20348.4648 fixed 10.0.20348.4648
- vendor:microsoft windows server 2022 23h2 affected < 10.0.25398.2092 fixed 10.0.25398.2092
- vendor:microsoft windows server 2025 affected < 10.0.26100.7623 fixed 10.0.26100.7623

## Fix

Apply the Microsoft update for CVE-2026-20805 or follow the vendor mitigations CISA references; the sources do not name the patched build.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20805
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-20805

## From the sources

Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_