Microsoft Windows DWM Core Library: Elevation of privilege vulnerability
Summary
A flaw in the Windows Desktop Window Manager (DWM) Core Library allows an authorized local user to elevate privileges. Microsoft classifies the weakness as an invalid pointer or reference release (CWE-763). The attack requires local access with a low-privileged account and high attack complexity, and it is not internet-facing. A successful attack could give an attacker high confidentiality, integrity and availability impact on the system.
Affected
- Windows 10 Version 1809, 21H2 and 22H2
- Windows 11 Version 23H2, 24H2, 25H2 and 26H2
- Windows Server 2019 (including Server Core), 2022 and 2025 (including Server Core)
- Exact affected ranges: see the vendor advisory.
Fixed in
- Windows 10 1809: 10.0.17763.9487 or later
- Windows 10 21H2: 10.0.19044.7846 or later
- Windows 10 22H2: 10.0.19045.7846 or later
- Windows 11 23H2: 10.0.22631.7711 or later
- Windows 11 24H2: 10.0.26100.9974 or later
- Windows 11 25H2: 10.0.26200.9974 or later
- Windows 11 26H2: 10.0.26300.9974 or later
- Windows Server 2019: 10.0.17763.9487 or later
- Windows Server 2022: 10.0.20348.5870 or later
- Windows Server 2025: 10.0.26100.33822 or later
- Update numbers (third-party, unverified): verify on MSRC before rollout.
Workaround
Unknown. No vendor workaround or mitigation has been identified; the patch is the only confirmed fix.
Exploitation
- Microsoft lists exploitation as not detected and exploitability as Unproven.
- VulDB reports no exploit available.
- No public proof of concept or known exploitation in the wild as of publication.
- CISA SSVC: exploitation none, not automatable, total technical impact.
Our recommendation
- Install the November 2026 cumulative updates on all affected Windows clients and servers, prioritising servers, terminal servers, VDI and shared workstations.
- Until patched, limit local logons on multi-user systems and remove unneeded local accounts.
- Monitor for changes in exploitation status and for the related DWM flaw CVE-2026-105581, which should be patched at the same time.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows DWM Core Library
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5132061, KB5132043, KB5131085, KB5131090, KB5131096, KB5131080
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center: CVE-2026-105582 msrc.microsoft.com
- CVE Record CVE-2026-105582 www.cve.org
- VulDB: CVE-2026-105582 vuldb.com
- Windows Forum: CVE-2026-105582 analysis windowsforum.com
- Strix: CVE-2026-105582 www.strix.ai
- Strix: CVE-2026-105581 (related DWM flaw) www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 09:32.
Original description (NVD)
Release of invalid pointer or reference in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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