CVE-2026-20805
MediumExploitedPublic exploitDesktop Window Manager Information Disclosure Vulnerability
Published Jan 13, 2026 · Updated Jul 30, 2026
Key Facts
Patch immediately- CVE-2026-20805 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Windows 10 1607 (Microsoft), Windows 10 1809 (Microsoft), windows 10 21H2 (Microsoft) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 13, 2026. Public exploit code is available.
- EPSS estimates a 7.5% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 10 1607 10.0.14393.8783, Windows 10 1809 10.0.17763.8276, windows 10 21H2 10.0.19044.6809.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
7.5%
Higher than 94.4% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-20805 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 13, 2026 | Feb 3, 2026 | Not reported |
| Industry KEV feed | Jan 13, 2026 | Feb 3, 2026 | Not reported |
| CIRCL KEV | Jan 13, 2026 | Feb 3, 2026 | Not reported |
| ENISA EUVD | Jan 13, 2026 | n/a | Not reported |
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.
Affected Products
60 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1607Microsoft | 10.0.14393.8783 | 10.0.14393.8783 |
| Windows 10 1809Microsoft | 10.0.17763.8276 | 10.0.17763.8276 |
| windows 10 21H2Microsoft | 10.0.19044.6809 | 10.0.19044.6809 |
| windows 10 22H2Microsoft | 10.0.19045.6809 | 10.0.19045.6809 |
| windows 11 23H2Microsoft | 10.0.22631.6491 | 10.0.22631.6491 |
Patched Releases
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, 10.0.26100.32230
Windows 10 Version 1607
10.0.14393.8783
Windows 10 Version 1809
10.0.17763.8276
Windows 10 Version 21H2
10.0.19044.6809
Windows 10 Version 22H2
10.0.19045.6809
Windows 11 version 22H3
10.0.22631.6491
Windows 11 version 23H2
10.0.22631.6491
Windows 11 Version 24H2
10.0.26100.7623
Windows 11 Version 25H2
10.0.26200.7623
Windows Server 2012
6.2.9200.25868
Windows Server 2012 (Server Core installation)
6.2.9200.25868
windows server 2012 R2
6.3.9600.22968
Windows Server 2012 R2 (Server Core installation)
6.3.9600.22968
Windows Server 2016 (Server Core installation)
10.0.14393.8783
Timeline
Publicly disclosed
Jan 13, 2026
Added to CISA KEV
Jan 13, 2026
Added to Industry KEV feed
Jan 13, 2026
Added to CIRCL KEV
Jan 13, 2026
Added to ENISA EUVD
Jan 13, 2026
Last updated
Jul 30, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
FAQ
Common Questions.
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Affected: Windows 10 1607 (Microsoft) versions 10.0.14393.8783; Windows 10 1809 (Microsoft) versions 10.0.17763.8276; windows 10 21H2 (Microsoft) versions 10.0.19044.6809, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 13, 2026.
Yes. It was added on Jan 13, 2026 with a federal remediation due date of Feb 3, 2026.
Public exploit code is available.
Fixed versions are available, including Windows 10 1607 10.0.14393.8783, Windows 10 1809 10.0.17763.8276, windows 10 21H2 10.0.19044.6809.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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