Microsoft Windows: Elevation of privilege in Windows Overlay Filter
Summary
The Windows Overlay Filter component of supported Windows 10, Windows 11 and Windows Server versions exposes sensitive system information to an unauthorized control sphere. A local user with low privileges who already has access to the system can use this to elevate privileges. The attack requires high complexity conditions and cannot be started remotely.
Affected
- Windows 10 Version 1607: 10.0.14393.0 before 10.0.14393.9688
- Windows 10 Version 1809: 10.0.17763.0 before 10.0.17763.9487
- Windows 10 Version 21H2: 10.0.19044.0 before 10.0.19044.7846
- Windows 10 Version 22H2: 10.0.19045.0 before 10.0.19045.7846
- Windows 11 Version 23H2: 10.0.22631.0 before 10.0.22631.7711
- Windows 11 Version 24H2: 10.0.26100.0 before 10.0.26100.9974
- Windows 11 Version 25H2: 10.0.26200.0 before 10.0.26200.9974
- Windows 11 Version 26H1: 10.0.28000.0 before 10.0.28000.3501
- Windows 11 Version 26H2: 10.0.26300.0 before 10.0.26300.9974
- Windows Server 2016 (including Server Core): 10.0.14393.0 before 10.0.14393.9688
- Windows Server 2019 (including Server Core): 10.0.17763.0 before 10.0.17763.9487
- Windows Server 2022: 10.0.20348.0 before 10.0.20348.5870
Fixed in
- Install the November 2026 cumulative update released on 10 November 2026 or later, which contains the fixed builds listed above.
- Verify the exact KB number for each product in the Microsoft Security Update Guide.
Workaround
Unknown.
Exploitation
- Microsoft rates exploit code maturity as Unproven (E:U).
- CISA SSVC: exploitation none, not automatable, total technical impact.
- No public proof of concept or exploitation in the wild found.
Our recommendation
- Identify Windows systems with affected builds, especially Windows 10 1607, 1809 and 21H2 and Windows Server 2016, 2019 and 2022.
- Deploy the November 2026 cumulative update, prioritizing shared, multi-user and sensitive systems.
- Monitor for public exploit code and raise the priority if one appears.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Overlay Filter
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center: CVE-2026-119822 msrc.microsoft.com
- CVE Record CVE-2026-119822 (CVE Program) www.cve.org
- Qualys: Microsoft Patch Tuesday November 2026 review blog.qualys.com
- Cisco Talos: Microsoft Patch Tuesday for November 2026 blog.talosintelligence.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, 08:45.
Original description (NVD)
Exposure of sensitive system information to an unauthorized control sphere in Windows Overlay Filter 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.
Affected? We can help.
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