Windows StateRepository API: Elevation of privilege via type confusion
Summary
A type confusion flaw in the Windows StateRepository API allows an authorized local user to elevate their privileges. The attacker needs valid local credentials and can then gain higher privileges on the affected system, with a high impact on confidentiality, integrity and availability. CISA SSVC rates the technical impact as total, but exploitation is not automatable and no active exploitation is known.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to below 10.0.14393.9612)
- Windows 10 Version 1809 (10.0.17763.0 to below 10.0.17763.9376)
- Windows 10 Version 21H2 and 22H2 (10.0.19044.0 to below 10.0.19044.7807; 10.0.19045.0 to below 10.0.19045.7807)
- Windows 11 Versions 23H2, 24H2, 25H2, 26H1 and 26H2 (see the MSRC advisory for the exact ranges)
- Windows Server 2012, 2012 R2 and 2016, including Server Core installations
- Note: the CPE data lists only Windows 10 1607, while the CNA record lists the wider scope above.
Fixed in
- Fixed builds according to the CNA record: 10.0.14393.9612 or later for Windows 10 1607 and Windows Server 2016; 10.0.17763.9376 or later for Windows 10 1809.
- Fixed in the October 13, 2026 Microsoft update release.
- The exact update (KB) for Windows 10 1607 is unknown. Confirm it on the MSRC advisory.
Workaround
Unknown.
Exploitation
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public exploitation is known at the time of this entry.
Our recommendation
- Install the October 2026 security updates on all affected Windows systems, including Windows 10 1607 and Windows Server 2016, as soon as possible.
- Check the MSRC advisory for the exact update for each product version.
- Inventory systems and restrict local logon to trusted users, as the attacker needs valid local access.
- Monitor for unusual privilege changes and new administrative accounts.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows StateRepository API
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5126835, KB5126836, KB5126868, KB5126651, KB5126657, KB5126655
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center advisory msrc.microsoft.com
- NVD mirror on Vulners vulners.com
- CVE list entry on Vulners vulners.com
- Tenable plugin 365470 www.tenable.com
- Tenable plugin 365467 www.tenable.com
- EUVD-2026-100366 on Vulners 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 2 Nov 2026, 05:12.
Original description (NVD)
Access of resource using incompatible type ('type confusion') in Windows StateRepository API 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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