Windows Diagnostic Policy Service: Heap-based buffer overflow allows privilege escalation
Summary
A heap-based buffer overflow in the Windows Diagnostic Policy Service allows an authorized local user to elevate privileges. Exploitation requires local access and a low-privilege account, and the attack complexity is high. Successful exploitation could lead to a full compromise of confidentiality, integrity and availability. NVD analysis was still pending at publication.
Affected
- Windows 10 Version 1607: 10.0.14393.0 to before 10.0.14393.9688
- Windows 10 Version 1809: 10.0.17763.0 to before 10.0.17763.9487
- Windows 10 Version 21H2: 10.0.19044.0 to before 10.0.19044.7846
- Windows 10 Version 22H2: 10.0.19045.0 to before 10.0.19045.7846
- Windows 11 Version 23H2: 10.0.22631.0 to before 10.0.22631.7711
- Windows 11 Version 24H2: 10.0.26100.0 to before 10.0.26100.9974
- Windows 11 Version 25H2: 10.0.26200.0 to before 10.0.26200.9974
- Windows 11 Version 26H1: 10.0.28000.0 to before 10.0.28000.3501
- Windows 11 Version 26H2: 10.0.26300.0 to before 10.0.26300.9974
- Server editions: Unknown.
Fixed in
- Cumulative updates that deliver the builds listed above or later (see the Microsoft Security Update Guide for KB numbers).
Workaround
Unknown.
Exploitation
- No exploitation confirmed.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- CVSS exploit maturity: unproven.
- No public proof of concept or CISA KEV entry known.
Our recommendation
- Install the Microsoft security update for the affected Windows builds through the regular monthly cycle, sooner on multi-user systems such as terminal servers and file servers.
- Identify machines still running Windows 10 1607, 1809, 21H2 or 22H2 and plan their upgrade or patching.
- Check the Microsoft advisory for any service-level workaround and verify whether Windows Server editions are affected.
- Limit local logons and restrict low-privilege accounts on shared systems.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Diagnostic Policy Service
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131087, KB5132061, KB5132043
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-112800 msrc.microsoft.com
- CVE Record: CVE-2026-112800 www.cve.org
- Strix AI: CVE-2026-112800 www.strix.ai
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, 09:13.
Original description (NVD)
Heap-based buffer overflow in Windows Diagnostic Policy Service 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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