Windows Advanced Rasterization Platform: Use-after-free leads to privilege escalation
Summary
A use-after-free vulnerability (CWE-416) in the Windows Advanced Rasterization Platform allows an authorized, local attacker to elevate privileges. The CVSS 3.1 base score is 8.8 (HIGH). Exploitation requires a local logon with low privileges, so the risk is mainly privilege escalation after an initial compromise, such as a phished user or a compromised service account.
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 and Version 26H2: before 10.0.26200.9711 and 10.0.26300.9711
- Windows 11 Version 26H1: before 10.0.28000.3231
- Windows Server 2022: before 10.0.20348.5761
- Windows Server 2025 (including Server Core): before 10.0.26100.33650
Fixed in
- Fixed builds are listed in the Microsoft update of October 13, 2026 (not confirmed from the primary source; verify on MSRC before patching).
- Possible KBs (from a sibling CVE, not confirmed for this CVE): KB5126651 (Windows 10 1809/Server 2019), KB5126657 (Windows 10 21H2/22H2), KB5126653 (Windows 11 23H2), KB5127648 (Windows 11 24H2), KB5126655 (Server 2022), KB5126646 (Server 2025).
- Unknown: whether a later update is required.
Workaround
Unknown. No workaround found in the sources. Patching is the documented fix.
Exploitation
- Microsoft's exploit maturity is E:U (Unproven), meaning no public exploit code is known.
- Senserva lists the CVE as not exploited; Strix reports it is not in CISA KEV.
- No public proof of concept was found. This does not prove that none exists.
- CISA SSVC: exploitation none, not automatable, total technical impact.
Our recommendation
- Prioritize patching of Windows Servers and Remote Desktop or multi-user systems; apply standard monthly patching to workstations.
- Confirm the exact build of each system against the MSRC page before rollout, and check that Windows 10 21H2, 22H2 and 1809 are still supported or covered by ESU, because unsupported builds will not receive the fix.
- Test the 24H2 update first, as it has documented known issues (Smart App Control, Remote Desktop logons for non-admin users, some USB audio devices).
- Limit interactive and remote logons on shared systems and monitor for unusual local privilege changes.
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 (MSRC) msrc.microsoft.com
- CVE Record (CNA: Microsoft) www.cve.org
- Strix: CVE-2026-118218 www.strix.ai
- Senserva: KB5127648 (Windows 11 24H2 known issues) senserva.com
- Vulners: CVE-2026-84019 (sibling CVE with KB references) 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, 22:18.
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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