Microsoft Windows Storport Miniport Driver: Elevation of privilege via heap overflow
Summary
A heap-based buffer overflow in the Windows Storport Miniport Driver allows a local attacker to elevate privileges. The attacker needs physical access to the device, but no privileges or user interaction are required. Microsoft rates exploit code maturity as Unproven, and no exploitation in the wild is known.
Affected
- Windows 10 Version 1607 and Windows Server 2016 (builds before 10.0.14393.9688)
- Windows 10 Version 1809 and Windows Server 2019 (builds before 10.0.17763.9487)
- Windows 10 Version 21H2 (builds before 10.0.19044.7846)
- Windows 10 Version 22H2 (affected per CVE record; fixed build to be confirmed in MSRC)
- Windows 11 Version 23H2, 24H2, 25H2, 26H1, 26H2 and Windows Server 2022 (affected per CVE record; fixed builds to be confirmed in MSRC)
Fixed in
- Windows 10 1607 / Server 2016: 10.0.14393.9688
- Windows 10 1809 / Server 2019: 10.0.17763.9487
- Windows 10 21H2: 10.0.19044.7846
- Other branches: see the MSRC Security Update Guide, as the retrieved CVE record was truncated.
Workaround
Unknown.
Exploitation
- Microsoft rates exploit code maturity as Unproven (E:U).
- No public exploit code or proof of concept was found.
- No evidence of exploitation in the wild; not listed in CISA KEV.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
Our recommendation
- Install the current Windows cumulative update on all affected systems, as listed by Microsoft.
- Prioritise shared, unattended, field-deployed, lost or stolen devices.
- Ensure full-disk encryption with PIN or TPM on laptops and workstations.
- Restrict physical access to servers and front-desk PCs.
- Verify installed build numbers after patching.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Storport Miniport Driver
- 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, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- MSRC Security Update Guide: CVE-2026-119885 msrc.microsoft.com
- CVE Record: CVE-2026-119885 www.cve.org
- Strix: CVE-2026-119885 (unverified build list) 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, 10:36.
Original description (NVD)
Heap-based buffer overflow in Windows Storport Miniport Driver allows an unauthorized attacker to elevate privileges with a physical attack.
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.