Windows DWM Core Library: Elevation of privilege via invalid pointer reference
Summary
A local elevation of privilege flaw in the Windows Desktop Window Manager (DWM) Core Library, classified as CWE-763 (release of invalid pointer or reference). An authorized local attacker with low privileges can gain higher privileges on the affected system. Exploitation requires a local logon or existing foothold and high attack complexity; Microsoft rates the severity as Important with CVSS 3.1 base score 7.0.
Affected
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to before 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to before 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to before 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to before 10.0.26200.9974)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9974)
- Windows Server 2019 and Server Core installation (10.0.17763.0 to before 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to before 10.0.20348.5870)
- Windows Server 2025 and Server Core installation (10.0.26100.0 to before 10.0.26100.33822)
- Note: the Windows 11 fixed builds are from a third-party tracker and not yet confirmed against the MSRC page.
Fixed in
- Install the November 2026 Microsoft security updates for each affected product.
- Fixed builds per the CVE record: 10.0.17763.9487 (Windows 10 1809 and Server 2019), 10.0.19044.7846 (21H2), 10.0.19045.7846 (22H2), 10.0.20348.5870 (Server 2022), 10.0.26100.33822 (Server 2025).
- KB numbers: Unknown.
Workaround
Unknown. No vendor-documented workaround was found; the Microsoft security update is the only documented remediation.
Exploitation
- Microsoft's temporal metrics show exploit code maturity Unproven and report confidence Confirmed.
- No public proof of concept and no report of exploitation in the wild were found.
- Not confirmed as listed in CISA KEV.
- SSVC assessment: Exploitation none, not automatable, total technical impact.
Our recommendation
- Patch all affected Windows 10, Windows 11 and Windows Server systems with the November 2026 security updates in the normal monthly cycle; prioritize shared multi-user systems, Remote Desktop/terminal servers, VDI and shared workstations.
- Check whether Windows 10 21H2 and 22H2 machines are still in use, as these are in scope and may no longer receive updates after their support end.
- Verify build numbers against the MSRC page before rollout.
- Monitor for public exploit code and for changes in exploitation status.
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 Update Guide: CVE-2026-105583 msrc.microsoft.com
- CVE.org record CVE-2026-105583 www.cve.org
- Strix: CVE-2026-105583 www.strix.ai
- Rapid7: Patch Tuesday November 2026 www.rapid7.com
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, 09:33.
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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