Windows NTFS: Remote code execution via untrusted pointer dereference
Summary
A flaw in the NTFS file system of supported Windows 10, Windows 11 and Windows Server editions allows an unauthorized attacker to execute code over a network. The weakness is an untrusted pointer dereference (CWE-822). According to the CVSS vector, no privileges are required, but user interaction is needed, so exploitation depends on a user action such as opening a crafted resource or a phishing lure.
Affected
- Windows 10 Version 1607 and Windows Server 2016 (including Server Core): before 10.0.14393.9688
- Windows 10 Version 1809 and Windows Server 2019 (including Server Core): before 10.0.17763.9487
- Windows 10 Version 21H2: before 10.0.19044.7846
- Windows 10 Version 22H2: before 10.0.19045.7846 (to be verified on MSRC)
- Windows 11 Version 23H2: before 10.0.22631.7711
- Windows 11 Version 24H2: before 10.0.26100.9974
- Windows 11 Version 25H2: before 10.0.26200.9974
- Windows 11 Version 26H1: before 10.0.28000.3501
- Windows 11 Version 26H2: before 10.0.26300.9974
- Windows Server 2022: before 10.0.20348.5870
Fixed in
Fixed in the builds listed for each affected version in the Microsoft Security Update Guide. Build numbers should be confirmed on MSRC before deployment.
Workaround
Unknown.
Exploitation
- No known exploitation at the time of writing.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public proof of concept found.
Our recommendation
- Patch affected Windows systems in the November 2026 update cycle, prioritizing servers and remote-access hosts.
- Verify the installed build against the fixed builds on MSRC before rollout.
- Check the MSRC advisory for mitigations and exploitation updates.
- Restrict inbound SMB and other network access from untrusted sources.
- Train users to avoid opening untrusted files and links.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Remote code execution – Windows NTFS
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation unlikely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE Record (Microsoft CNA) www.cve.org
- MSRC Security Update Guide msrc.microsoft.com
- Third-party mirror (Strix) www.strix.ai
- Senserva update notes 21H2 and 24H2 senserva.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, 00:01.
Original description (NVD)
Untrusted pointer dereference in Windows NTFS allows an unauthorized attacker to execute code over a network.
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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