Windows Advanced Rasterization Platform: Heap buffer overflow, local privilege escalation
Summary
A heap-based buffer overflow (CWE-122) in the Windows Advanced Rasterization Platform allows an authorized local attacker to elevate privileges. The CVSS base score is 8.8 (High) with a changed scope, so the impact can extend beyond the vulnerable component. Exploitation requires a local foothold with low privileges and no user interaction.
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
- Windows 10 1809 and Server 2019: 10.0.17763.9376 or later
- Windows 10 21H2: 10.0.19044.7807 or later
- Windows 10 22H2: 10.0.19045.7807 or later
- Windows 11 23H2: 10.0.22631.7652 or later
- Windows 11 24H2: 10.0.26100.9711 or later
- Windows 11 25H2: 10.0.26200.9711 or later
- Windows 11 26H1: 10.0.28000.3231 or later
- Windows 11 26H2: 10.0.26300.9711 or later
- Windows Server 2022: 10.0.20348.5761 or later
- Windows Server 2025: 10.0.26100.33650 or later
KB numbers: Unknown. Verify on the MSRC page.
Workaround
Unknown. No vendor workaround has been identified. Install the fixed build; check the MSRC page for any listed mitigation.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found (not exhaustively searched).
- CISA KEV status not confirmed.
- The CVE record carries the exploit maturity value 'unproven' (E:U).
Our recommendation
- Install the November 2026 cumulative update that contains the fixed build for each affected Windows version.
- Prioritize shared or multi-user systems, RDS/terminal servers and systems where users run untrusted software.
- Until patched, limit local foothold risk with least privilege and application control.
- Verify build numbers and KB articles on the MSRC page before rollout.
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 CVE-2026-105026 (CNA: Microsoft) www.cve.org
- MSRC Security Update Guide: CVE-2026-105026 msrc.microsoft.com
- Strix CVE-2026-105026 (third-party mirror) www.strix.ai
- ZDI: The November 2026 Security Update Review www.zerodayinitiative.com
- Tenable: Microsoft 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 11 Nov 2026, 00:08.
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.
Affected? We can help.
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