Windows DWM Core Library: Local privilege escalation via type confusion
Summary
A type confusion flaw (CWE-843) in the Windows DWM Core Library, the Desktop Window Manager component of Windows, allows a locally authorized attacker to elevate privileges. An attacker with an existing low-privileged foothold, such as a user session or malware running as a standard user, could gain SYSTEM rights on the affected host. No user interaction is required. Microsoft rates the CVSS score 7.8 (High).
Affected
- Windows 10 Version 1809 (before 10.0.17763.9487)
- Windows 10 Version 21H2 (before 10.0.19044.7846)
- Windows 10 Version 22H2 (before 10.0.19045.7846)
- Windows 11 Version 23H2 (before 10.0.22631.7711)
- Windows 11 Version 24H2 (before 10.0.26100.9974, unverified)
- Windows 11 Version 25H2 (before 10.0.26200.9974)
- Windows 11 Version 26H2 (before 10.0.26300.9974)
- Windows Server 2019, including Server Core (before 10.0.17763.9487)
- Windows Server 2022 (before 10.0.20348.5870)
- Windows Server 2025, including Server Core (before 10.0.26100.33822, unverified)
Fixed in
- Fixed in the November 2026 Windows security updates.
- Exact fixed build per product: see the MSRC entry; not verified here.
- KB mapping for this CVE: Unknown.
Workaround
- None known. Installing the security update is the only remedy.
Exploitation
- Not known to be exploited in the wild (CISA SSVC: exploitation none).
- No public proof of concept found; exploit maturity is marked unproven (E:U).
- Local attack only; the attacker needs an existing low-privileged foothold.
Our recommendation
- Install the November 2026 Windows security update on all affected systems, starting with Remote Desktop/terminal servers and shared workstations.
- Check the MSRC entry for the KB number per build and verify the installation.
- Patch single-user workstations in the normal monthly cycle.
- Monitor multi-user systems for signs of privilege escalation.
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)
- KB5131085, KB5131090, KB5131096, KB5131080, KB5131077, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center: CVE-2026-105575 msrc.microsoft.com
- CVE Record CVE-2026-105575 www.cve.org
- Senserva KB 5131096 senserva.com
- Senserva KB 5132061 senserva.com
- Rescana: Microsoft Patch Tuesday November 2026 www.rescana.com
- Strix: CVE-2026-105575 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, 04:28.
Original description (NVD)
Access of resource using incompatible type ('type confusion') 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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