Microsoft Windows Advanced Rasterization Platform: Local privilege escalation via heap overflow
Summary
A heap-based buffer overflow in the Windows Advanced Rasterization Platform allows an authorized local attacker to elevate privileges. The attacker needs a low-privilege account or code execution on the affected system, and no user interaction is required. A successful attack would give the attacker high impact on confidentiality, integrity and availability of the host.
Affected
- Windows 10 Version 1809: builds below 10.0.17763.9376
- Windows 10 Version 21H2: builds below 10.0.19044.7807
- Windows 10 Version 22H2: builds below 10.0.19045.7807
- Windows 11 Version 23H2: builds below 10.0.22631.7652
- Windows 11 Version 24H2: builds below 10.0.26100.9711
- Windows 11 Version 25H2: builds below 10.0.26200.9711
- Windows 11 Version 26H1: builds below 10.0.28000.3231
- Windows 11 Version 26H2: builds below 10.0.26300.9711
- Windows Server 2019 (including Server Core): builds below 10.0.17763.9376
- Windows Server 2022: builds below 10.0.20348.5761
- Windows Server 2025 (including Server Core): builds below 10.0.26100.33650
- Note: the Windows 11 and Windows Server entries were taken from a third-party aggregator and must be verified against MSRC.
Fixed in
- Fixed in the builds listed above (verify exact fixed build against MSRC).
- KB5132061 is reported as a security update for Windows 11 Version 24H2 released 2026-11-10; it is not confirmed as containing the fix for this CVE.
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found.
- Not listed in CISA KEV at the time of research.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Patch affected Windows 10, Windows 11 and Windows Server systems in the November 2026 update cycle, with priority on servers and multi-user systems.
- Verify the fixed build for each product in the Microsoft Security Update Guide before rollout.
- Restrict local logon and limit untrusted users and software on terminal and RDP servers.
- Monitor for unexpected privilege escalation on endpoints.
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
- MSRC Security Update Guide: CVE-2026-118222 msrc.microsoft.com
- CVE.org record CVE-2026-118222 www.cve.org
- Strix CVE-2026-118222 www.strix.ai
- Senserva KB5132061 senserva.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, 03:58.
Original description (NVD)
Heap-based buffer overflow 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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