Information disclosure in Microsoft Windows 10 1607
CVE-2026-20805
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.075 (94.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.052 · newest: 0.075 · change: +0.023
Affected products
- Microsoft Windows 10 1607
- Microsoft Windows 10 1809
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
- Microsoft Windows 11 23h2
- Microsoft Windows 11 24h2
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
- ZeroDayEvil/CVE-2026-20805-PoC
- fevar54/CVE-2026-20805-POC
- Uzair-Baig0900/CVE-2026-20805-PoC
- SimoesCTT/-SCTT-2026-33-0002-DWM-Visual-Field-Singularity
- ZeroDayEvil/CVE-2026-20805-POC
- SimoesCTT/SCTT-2026-33-0002-DWM-Visual-Field-Singularity
- mrk336/Inside-CVE-2026-20805-How-a-Windows-DWM-Flaw-Exposed-Sensitive-Data
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805 (vendor-advisory, patch, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-20805?
- CVE-2026-20805 is a medium-severity vulnerability in Microsoft Windows 10 1607, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-01-13.
- How severe is CVE-2026-20805?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2026-20805 known to be exploited?
- Yes. CVE-2026-20805 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-01-13), indicating it is being actively exploited. 7 public proof-of-concept repositories are indexed.