Windows Advanced Rasterization Platform: Elevation of privilege via use after free
Summary
A use-after-free flaw in the Windows Advanced Rasterization Platform component allows an authorized local user to elevate privileges. An attacker who already has a low-privileged account or code running as a standard user could gain SYSTEM rights, with high impact on confidentiality, integrity and availability. The flaw is not remotely exploitable, so the risk is highest on shared multi-user systems such as terminal servers.
Affected
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9376)
- Windows 10 Version 21H2 (10.0.19044.0 to before 10.0.19044.7807)
- Windows 10 Version 22H2 (10.0.19045.0 to before 10.0.19045.7807)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7652)
- Windows 11 Version 24H2 (10.0.26100.0 to before 10.0.26100.9711)
- Windows 11 Version 25H2 (10.0.26200.0 to before 10.0.26200.9711)
- Windows 11 Version 26H1 (10.0.28000.0 to before 10.0.28000.3231)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9711)
- Windows Server 2019 incl. Server Core (10.0.17763.0 to before 10.0.17763.9376)
- Windows Server 2022 (10.0.20348.0 to before 10.0.20348.5761)
- Windows Server 2025 incl. Server Core (10.0.26100.0 to before 10.0.26100.33650)
Fixed in
Unknown. The CVE record gives upper bounds for the affected ranges, but these builds match the October 2026 updates for CVE-2026-84019 in the same component. Confirm the fixed builds and KB numbers for each Windows version on the Microsoft Security Update Guide before relying on them.
Workaround
Unknown. Microsoft gives no mitigation. Install the security update.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof-of-concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- NVD analysis pending at the time of publication.
Our recommendation
- Include the fix in the November 2026 cumulative update rollout after verifying the builds on the Microsoft advisory.
- Prioritise multi-user systems such as RDS and terminal servers, shared kiosks and workstations with many users.
- Check whether any Windows 10 1809 systems are still in support.
- Monitor for unusual privilege changes and new local admin accounts.
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-2026-118216 msrc.microsoft.com
- CVE Record CVE-2026-118216 (CVE.org) www.cve.org
- Strix AI: CVE-2026-118216 (third-party aggregator) www.strix.ai
- Vulners: CVE-2026-84019 (same component, October 2026 builds) vulners.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 10 Nov 2026, 22:16.
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.
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