Windows Storport Miniport Driver: Heap-based buffer overflow
Summary
A heap-based buffer overflow (CWE-122) in the Windows Storport Miniport Driver, the vendor-specific storage driver component of Windows. According to the CVE description, an unauthorized attacker with physical access can execute code. The CVSS 3.1 vector (6.8, Medium) is AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, which means high impact on confidentiality, integrity and availability. The official record title says Remote Code Execution, which conflicts with the physical attack vector, so Microsoft's advisory should be checked.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to < 10.0.14393.9688)
- Windows 10 Version 1809 (10.0.17763.0 to < 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to < 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to < 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to < 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to < 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to < 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 to < 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 to < 10.0.26300.9974)
- Windows Server 2016 incl. Server Core (10.0.14393.0 to < 10.0.14393.9688)
- Windows Server 2019 incl. Server Core (10.0.17763.0 to < 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to < 10.0.20348.5870)
Fixed in
- Fixed builds as listed in the CVE record: 10.0.14393.9688, 10.0.17763.9487, 10.0.19044.7846, 10.0.19045.7846, 10.0.22631.7711, 10.0.26100.9974, 10.0.26200.9974, 10.0.28000.3501, 10.0.26300.9974, 10.0.20348.5870
- Fixes are included in the November 2026 Windows updates. Unknown: exact KB numbers per version (not verified on the MSRC page).
Workaround
Unknown.
Exploitation
- CISA SSVC: exploitation none, not automatable, total technical impact.
- No public exploitation reported in the sources consulted.
Our recommendation
- Install the November 2026 Windows security updates on all affected systems, prioritizing servers.
- Verify installed builds against the fixed versions listed above.
- Restrict physical access to servers and workstations with storage controllers.
- Check the MSRC advisory for the exact KB numbers and any further guidance.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Remote code execution – 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, KB5131087, KB5131090, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-119823 msrc.microsoft.com
- CVE Record: CVE-2026-119823 www.cve.org
- Strix: CVE-2026-119823 www.strix.ai
- Vulners: PT-2026-119823 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 11 Nov 2026, 10:38.
Original description (NVD)
Heap-based buffer overflow in Windows Storport Miniport Driver allows an unauthorized attacker to execute code 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.
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