Windows Advanced Rasterization Platform: Use-after-free allows local privilege escalation
Summary
A use-after-free flaw in the Windows Advanced Rasterization Platform allows an authorized attacker to elevate privileges locally. The attacker needs local access and a low-privilege account, and exploitation is rated as complex (high attack complexity). Microsoft fixed the flaw in its November 2026 Patch Tuesday, and no active exploitation is known.
Affected
- Windows 10 Version 1809 and Windows Server 2019 (including Server Core): 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 2022: before 10.0.20348.5761
- Windows Server 2025 (including Server Core): before 10.0.26100.33650
Fixed in
- Install the November 2026 cumulative update for each affected Windows version.
- Fixed builds are 10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807, 10.0.22631.7652, 10.0.26100.9711, 10.0.26200.9711, 10.0.28000.3231, 10.0.26300.9711, 10.0.20348.5761 and 10.0.26100.33650 or later.
- Verify the fixed builds against the Microsoft Security Update Guide.
Workaround
Unknown.
Exploitation
- Not known to be exploited.
- No public proof of concept known; the CVE record gives exploit code maturity as unproven.
- CISA SSVC: Exploitation none, not automatable.
Our recommendation
- Patch with the November 2026 cumulative update in the normal monthly cycle.
- Prioritize shared terminal servers, RDS hosts and multi-user systems, then standard workstations.
- Ensure endpoint protection, least-privilege accounts and monitoring for privilege escalation are in place.
- Check ESU status for Windows 10 systems, as older branches may need extended support.
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 (vendor advisory) msrc.microsoft.com
- CVE Record (Microsoft CNA) www.cve.org
- Rapid7 Patch Tuesday November 2026 www.rapid7.com
- The Register: November 2026 Patch Tuesday www.theregister.com
- Zero Day Initiative: November 2026 security update review www.zerodayinitiative.com
- Strix CVE details (third party) www.strix.ai
- Newsbeep November 2026 Patch Tuesday www.newsbeep.com
- it-sb.ch Patch Tuesday 2026-11 (earlier snapshot) www.it-sb.ch
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, 03:58.
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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