CVE-2026-20805
Confirmed PUBLISHEDDesktop Window Manager Information Disclosure Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
- CVE Published
- Jan 13, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 5.5 Medium
- EPSS
- 5.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Microsoft |
Windows 10 Version 1607
|
10.0.14393.0 to < 10.0.14393.8783 |
Affected |
| Microsoft |
Windows 10 Version 1809
|
10.0.17763.0 to < 10.0.17763.8276 |
Affected |
| Microsoft |
Windows 10 Version 21H2
|
10.0.19044.0 to < 10.0.19044.6809 |
Affected |
| Microsoft |
Windows 10 Version 22H2
|
10.0.19045.0 to < 10.0.19045.6809 |
Affected |
| Microsoft |
Windows 11 version 22H3
|
10.0.22631.0 to < 10.0.22631.6491 |
Affected |
| Microsoft |
Windows 11 Version 23H2
|
10.0.22631.0 to < 10.0.22631.6491 |
Affected |
| Microsoft |
Windows 11 Version 24H2
|
10.0.26100.0 to < 10.0.26100.7623 |
Affected |
| Microsoft |
Windows 11 Version 25H2
|
10.0.26200.0 to < 10.0.26200.7623 |
Affected |
| Microsoft |
Windows Server 2012
|
6.2.9200.0 to < 6.2.9200.25868 |
Affected |
| Microsoft |
Windows Server 2012 (Server Core installation)
|
6.2.9200.0 to < 6.2.9200.25868 |
Affected |
| Microsoft |
Windows Server 2012 R2
|
6.3.9600.0 to < 6.3.9600.22968 |
Affected |
| Microsoft |
Windows Server 2012 R2 (Server Core installation)
|
6.3.9600.0 to < 6.3.9600.22968 |
Affected |
| Microsoft |
Windows Server 2016
|
10.0.14393.0 to < 10.0.14393.8783 |
Affected |
| Microsoft |
Windows Server 2016 (Server Core installation)
|
10.0.14393.0 to < 10.0.14393.8783 |
Affected |
| Microsoft |
Windows Server 2019
|
10.0.17763.0 to < 10.0.17763.8276 |
Affected |
| Microsoft |
Windows Server 2019 (Server Core installation)
|
10.0.17763.0 to < 10.0.17763.8276 |
Affected |
| Microsoft |
Windows Server 2022
|
10.0.20348.0 to < 10.0.20348.4648 |
Affected |
| Microsoft |
Windows Server 2022, 23H2 Edition (Server Core installation)
|
10.0.25398.0 to < 10.0.25398.2092 |
Affected |
| Microsoft |
Windows Server 2025
|
10.0.26100.0 to < 10.0.26100.32230 |
Affected |
| Microsoft |
Windows Server 2025 (Server Core installation)
|
10.0.26100.0 to < 10.0.26100.32230 |
Affected |
CVE References
- Desktop Window Manager Information Disclosure Vulnerability msrc.microsoft.com · Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:48 UTC |
| CISA | 2026-06-02 14:04 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:48:47 UTC · CVE
Proof of concept available
Recorded 2026-01-28 03:50:36 UTC · GitHub
Weaknesses (CWE)
-
Exposure of Sensitive Information to an Unauthorized Actor
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-01-28 03:50:36 UTC · 0 stars
CVE‑2026‑20805: A Windows Desktop Window Manager flaw causing local information disclosure. Requires low privileges, no user interaction. Rated CVSS 5.5 (Medium). Actively exploited and listed in CISA KEV; patch released January 2026.
github · Created 2026-01-19 19:16:25 UTC · 2 stars
The PoC of information disclosure in Microsoft Desktop Windows Management.
github · Created 2026-01-14 13:26:26 UTC · 7 stars
# CVE-2026-20805 PoC Prueba de concepto para la vulnerabilidad de divulgación de información en **Desktop Windows Manager (dwm.exe)** de Microsoft. ## 📋 Resumen de la Vulnerabilidad - **ID:** CVE-2026-20805 - **Producto:** Microsoft Windows
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:04 UTC about 2 months ago14:04 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:48 UTC about 2 months ago10:48 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
13:26 UTC 6 months ago13:26 UTC · 6 months ago
Public PoC available
Public proof-of-concept code published
-
17:56 UTC 6 months ago17:56 UTC · 6 months ago
CVE published
Vulnerability disclosed publicly
-
05:54 UTC 8 months ago05:54 UTC · 8 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-20805
{
"cve_id": "CVE-2026-20805",
"title": "Desktop Window Manager Information Disclosure Vulnerability",
"affected_vendor": "Microsoft",
"affected_product": "Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 5.5,
"epss_score": 0.05028,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}