Microsoft Windows Advanced Rasterization Platform: Elevation of privilege via use after free
Summary
A use-after-free flaw (CWE-416) in the Windows Advanced Rasterization Platform allows an authorized local user to elevate privileges. The CVSS 3.1 base score is 7.8 (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H), so a successful exploit would give full control of the affected host. An attacker needs a local foothold with low privileges and a high-complexity condition, so the flaw is not directly reachable from the internet.
Affected
- Windows 10 Version 1809 before 10.0.17763.9376
- Windows 10 Version 21H2 before 10.0.19044.7807
- Windows 10 Version 22H2 before 10.0.19045.7807
- Windows 11 Version 23H2 before 10.0.22631.7652
- Windows 11 Version 24H2 before 10.0.26100.9711
- Windows 11 Version 25H2 before 10.0.26200.9711
- Windows 11 Version 26H1 before 10.0.28000.3231
- Windows 11 Version 26H2 before 10.0.26300.9711
- Windows Server 2019 (including Server Core) before 10.0.17763.9376
- Windows Server 2022 before 10.0.20348.5761
- Windows Server 2025 (including Server Core) before 10.0.26100.33650
- Note: the build numbers for Windows 11 24H2 and Server 2025 differ and are not fully confirmed by the vendor advisory.
Fixed in
Install the November 2026 cumulative updates with the build numbers listed above or later. Exact KB numbers per product: Unknown. Verify them in the Microsoft Security Update Guide.
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild for this CVE found.
- No public proof-of-concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- The sources do not name the single in-the-wild exploited vulnerability from the November 2026 release.
Our recommendation
- Patch all affected Windows 10, Windows 11 and Windows Server systems with the November 2026 cumulative updates in the normal monthly cycle.
- Prioritise multi-user terminal servers, shared workstations and hosts where untrusted users run code.
- Check whether Windows 10 21H2 and 22H2 systems are covered by Extended Security Updates.
- Monitor the Microsoft advisory and NVD for updates on exploitation status.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Advanced Rasterization Platform
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5126651, KB5126657, KB5126655, KB5126653, KB5127648, KB5126646
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-118215 msrc.microsoft.com
- CVE Record CVE-2026-118215 www.cve.org
- VulDB CVE-2026-118215 vuldb.com
- Rapid7 Patch Tuesday November 2026 www.rapid7.com
- Talos Patch Tuesday November 2026 blog.talosintelligence.com
- Qualys Patch Tuesday November 2026 review blog.qualys.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, 04:00.
Original description (NVD)
Use after free in Windows Advanced Rasterization Platform 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.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.