---
id: CVE-2026-20805
title: >-
  Exposure of sensitive information to an unauthorized actor in Desktop Windows
  Manager allows an authorized attacker to disclose information locally.
summary: >-
  Exposure of sensitive information to an unauthorized actor in Desktop Windows
  Manager allows an authorized attacker to disclose information locally.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-200
vendor: microsoft
product: windows_10_1607
affected:
  - windows_10_1607 < 10.0.14393.8783
  - windows_10_1809 < 10.0.17763.8276
  - windows_10_21h2 < 10.0.19044.6809
  - windows_10_22h2 < 10.0.19045.6809
  - windows_11_23h2 < 10.0.22631.6491
  - windows_11_24h2 < 10.0.26100.7623
  - windows_11_25h2 < 10.0.26200.7623
  - windows_server_2012
  - windows_server_2012 = r2
  - windows_server_2016 < 10.0.14393.8783
  - windows_server_2019 < 10.0.17763.8276
  - windows_server_2022 < 10.0.20348.4648
  - windows_server_2022_23h2 < 10.0.25398.2092
  - windows_server_2025 < 10.0.26100.7623
patched:
  - windows_10_1607 10.0.14393.8783
  - windows_10_1809 10.0.17763.8276
  - windows_10_21h2 10.0.19044.6809
  - windows_10_22h2 10.0.19045.6809
  - windows_11_23h2 10.0.22631.6491
  - windows_11_24h2 10.0.26100.7623
  - windows_11_25h2 10.0.26200.7623
  - windows_server_2016 10.0.14393.8783
  - windows_server_2019 10.0.17763.8276
  - windows_server_2022 10.0.20348.4648
  - windows_server_2022_23h2 10.0.25398.2092
  - windows_server_2025 10.0.26100.7623
published: '2026-01-13'
updated: '2026-07-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20805'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805'
    label: secure@microsoft.com
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.07203
epssPercentile: 0.94098
kev: true
kevDateAdded: '2026-01-13'
kevDueDate: '2026-02-03'
kevRansomware: false
exploited: true
zeroDay: true
ingestedAt: '2026-07-31T06:58:51.142Z'
exploits:
  github: 6
  githubRepos:
    - 'https://github.com/fevar54/CVE-2026-20805-POC'
    - 'https://github.com/Uzair-Baig0900/CVE-2026-20805-PoC'
    - >-
      https://github.com/mrk336/Inside-CVE-2026-20805-How-a-Windows-DWM-Flaw-Exposed-Sensitive-Data
  checkedAt: '2026-09-27T10:33:41.916Z'
exploitAvailable: true
---

## Overview

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

## Affected

- `windows_10_1607 < 10.0.14393.8783`
- `windows_10_1809 < 10.0.17763.8276`
- `windows_10_21h2 < 10.0.19044.6809`
- `windows_10_22h2 < 10.0.19045.6809`
- `windows_11_23h2 < 10.0.22631.6491`
- `windows_11_24h2 < 10.0.26100.7623`
- `windows_11_25h2 < 10.0.26200.7623`
- `windows_server_2012`
- `windows_server_2012 = r2`
- `windows_server_2016 < 10.0.14393.8783`
- `windows_server_2019 < 10.0.17763.8276`
- `windows_server_2022 < 10.0.20348.4648`
- `windows_server_2022_23h2 < 10.0.25398.2092`
- `windows_server_2025 < 10.0.26100.7623`

## Remediation

Upgrade past the affected range:

- `windows_10_1607 10.0.14393.8783`
- `windows_10_1809 10.0.17763.8276`
- `windows_10_21h2 10.0.19044.6809`
- `windows_10_22h2 10.0.19045.6809`
- `windows_11_23h2 10.0.22631.6491`
- `windows_11_24h2 10.0.26100.7623`
- `windows_11_25h2 10.0.26200.7623`
- `windows_server_2016 10.0.14393.8783`
- `windows_server_2019 10.0.17763.8276`
- `windows_server_2022 10.0.20348.4648`
- `windows_server_2022_23h2 10.0.25398.2092`
- `windows_server_2025 10.0.26100.7623`