Windows Storport Miniport Driver: Privilege escalation via heap-based buffer overflow
Summary
A heap-based buffer overflow in the Windows Storport Miniport Driver allows an attacker to elevate privileges to SYSTEM. The attack vector is physical access to the affected device, and no account or user interaction is required. Remote exploitation over the network is not possible according to the CVSS vector. Microsoft rates the flaw at CVSS 6.8 (Medium), and no exploitation is known.
Affected
- Windows 10 Version 1607: before 10.0.14393.9688
- Windows 10 Version 1809: before 10.0.17763.9487
- Windows 10 Version 21H2: before 10.0.19044.7846
- Windows 10 Version 22H2: before 10.0.19045.7846
- 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 2016 (including Server Core): before 10.0.14393.9688
- Windows Server 2019 (including Server Core): before 10.0.17763.9487
- Windows Server 2022: before 10.0.20348.5870
Fixed in
- Windows 10 1607 / Server 2016: KB5131291, OS build 14393.9688
- Windows 10 1809 / Server 2019: KB5131085, OS build 17763.9487
- Windows 10 21H2 / 22H2 (ESU): KB5131096, builds 19044.7846 and 19045.7846
- Windows 11 24H2: KB5132061 reported by a third-party source, build number unconfirmed
- Windows 11 23H2, 25H2, 26H1, 26H2 and Server 2022: fix KB not confirmed; check the MSRC advisory
Workaround
- No vendor workaround known.
- Install the matching November 2026 cumulative update.
- Interim measure (not from the vendor): restrict physical access to servers and workstations and lock unused ports.
Exploitation
- No in-the-wild exploitation or public proof-of-concept code known.
- CISA SSVC: exploitation none, not automatable, total technical impact.
- CVSS exploit maturity: unproven (E:U).
Our recommendation
- Patch Windows 10 1607 and 1809 systems and any unsupported systems first, and confirm ESU eligibility.
- Install the November 2026 cumulative update on all affected Windows versions and verify the fixed build in the MSRC advisory.
- Restrict physical access to servers and PCs, especially those with storage controllers, and secure unused ports.
- Monitor for unauthorized physical access and insider misuse.
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-2026-119830 msrc.microsoft.com
- CVE.org CVE Record: CVE-2026-119830 www.cve.org
- Strix: CVE-2026-119830 (secondary aggregator) www.strix.ai
- Microsoft KB5131291: Windows 10 1607 security update support.microsoft.com
- Microsoft KB5131085: Windows 10 1809 security update support.microsoft.com
- Microsoft KB5131096: Windows 10 21H2/22H2 security update (ESU) support.microsoft.com
- Pureinfotech: November 2026 Windows update overview pureinfotech.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 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.
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