Microsoft Windows Advanced Rasterization Platform: Elevation of privilege via use after free
Summary
A use-after-free flaw in the Windows Advanced Rasterization Platform (WARP), a software graphics rendering component of Windows, allows an authorized local attacker to elevate privileges. The CVSS base score is 8.8 (High), with a scope change and high impact on confidentiality, integrity and availability. Exploitation requires a local foothold with low privileges, such as a low-privilege account, malware or a compromised user session; it is not directly exploitable from the internet.
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 (including 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 (including Server Core): 10.0.26100.0 to before 10.0.26100.33650
Fixed in
- Fixed builds as listed by the CNA record (first fixed builds in the affected ranges; confirm the exact November 2026 cumulative update KB on the MSRC page):
- Windows 10 1809: 10.0.17763.9376
- Windows 10 21H2: 10.0.19044.7807
- Windows 10 22H2: 10.0.19045.7807
- Windows 11 23H2: 10.0.22631.7652
- Windows 11 24H2: 10.0.26100.9711
- Windows 11 25H2: 10.0.26200.9711
- Windows 11 26H1: 10.0.28000.3231
- Windows 11 26H2: 10.0.26300.9711
- Windows Server 2019: 10.0.17763.9376
- Windows Server 2022: 10.0.20348.5761
- Windows Server 2025: 10.0.26100.33650
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild found.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
- No public proof of concept found; CVSS exploit maturity is unproven (E:U).
Our recommendation
- Install the November 2026 Windows cumulative update on all affected systems, prioritising multi-user servers, terminal servers and systems where many users have logon rights.
- Check that all systems run a supported Windows version; Windows 10 1809, 21H2 and 22H2 and their support status must be verified, as out-of-support systems will not receive this fix.
- Restrict local logon rights and monitor for suspicious local privilege escalation activity.
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
- CVE record (CNA: Microsoft) www.cve.org
- MSRC advisory msrc.microsoft.com
- Strix aggregator (builds, KEV field) www.strix.ai
- Tenable, November 2026 Patch Tuesday www.tenable.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, 22:15.
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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