Windows Advanced Rasterization Platform: Local privilege escalation
Summary
The Windows Advanced Rasterization Platform (ARP), a component of the Windows graphics stack, contains an out-of-bounds read (CWE-122, CWE-125). An authorized local user can exploit it to elevate privileges. An attacker first needs a low-privileged session on the affected system, for example through phishing or a malicious application. The CVSS base score is 8.8, but no exploitation has been reported.
Affected
- Windows 10 Version 1809 (10.0.17763.0 before 10.0.17763.9376)
- Windows 10 Version 21H2 (10.0.19044.0 before 10.0.19044.7807)
- Windows 10 Version 22H2 (10.0.19045.0 before 10.0.19045.7807)
- Windows 11 Version 23H2 (10.0.22631.0 before 10.0.22631.7652)
- Windows 11 Version 24H2 (10.0.26100.0 before 10.0.26100.9711)
- Windows 11 Version 25H2 (10.0.26200.0 before 10.0.26200.9711)
- Windows 11 Version 26H1 (10.0.28000.0 before 10.0.28000.3231)
- Windows 11 Version 26H2 (10.0.26300.0 before 10.0.26300.9711)
- Windows Server 2019, including Server Core (10.0.17763.0 before 10.0.17763.9376)
- Windows Server 2022 (10.0.20348.0 before 10.0.20348.5761)
- Windows Server 2025, including Server Core (10.0.26100.0 before 10.0.26100.33650)
Fixed in
- The CVE record lists the upper limits above as the first fixed builds. This is not yet confirmed by Microsoft's advisory or the November 2026 KB articles. Verify before rollout.
Workaround
Unknown. No vendor workaround is documented in the sources reviewed. Apply the security update.
Exploitation
- No evidence of exploitation in the wild found.
- No public proof of concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- CVSS temporal value E:U (Unproven), per the CVE record.
- CISA KEV status not checked.
Our recommendation
- Install the November 2026 Windows security update on all affected systems, prioritising multi-user systems, terminal servers and shared workstations.
- Confirm the fixed build numbers in the MSRC advisory before rollout.
- Restrict untrusted applications and documents to standard user accounts and limit local accounts.
- Monitor for public proof-of-concept code and check the NVD and CISA KEV status.
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: CVE-2026-105499 msrc.microsoft.com
- CVE Record CVE-2026-105499 (CVE.org) www.cve.org
- Strix.ai: CVE-2026-105499 (third-party aggregator) www.strix.ai
- Zero Day Initiative: November 2026 Security Update Review www.zerodayinitiative.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, 00:03.
Original description (NVD)
Out-of-bounds read 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.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.