Microsoft Windows Server 2025: Remote code execution in Storport Miniport Driver
Summary
A use-after-free vulnerability in the Windows Storport Miniport Driver of Windows Server 2025, including Server Core installations, allows code execution over a network. According to the CVE description, an unauthorized attacker can exploit it, but the CVSS vector requires user interaction (UI:R), and the public sources do not describe the required user action or the network path to the vulnerable code. Microsoft has fixed the issue in its October 2026 security update; no exploitation in the wild is known.
Affected
- Microsoft Windows Server 2025 (10.0.26100.0 to before 10.0.26100.33650)
- Microsoft Windows Server 2025 (Server Core installation) (10.0.26100.0 to before 10.0.26100.33650)
- Build number to be verified against the MSRC advisory table.
Fixed in
- Security update of October 2026 (release date October 13, 2026), build 10.0.26100.33650 or later according to the CVE record.
- Exact KB number to be confirmed in the Microsoft Update Catalog or on MSRC (Tenable references KB5126646).
Workaround
Unknown. No workaround was found in the sources; check the MSRC advisory.
Exploitation
- Not known to be exploited in the wild; not listed in the CISA KEV catalog.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public proof of concept found.
- EPSS about 0.007 (snapshot).
Our recommendation
- Install the October 2026 cumulative update on all Windows Server 2025 systems, prioritising servers that use iSCSI, SAN or other storage networking or that are reachable from untrusted networks.
- Until patched, restrict network access to storage-related services.
- Verify the KB number and workarounds in the MSRC advisory before deployment.
- Recheck the NVD record, as its status may have changed.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Important
- Impact
- Remote code execution – Windows Storport Miniport Driver
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation unlikely
- Product family
- Windows
- Updates (KB)
- KB5126646
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-69765 msrc.microsoft.com
- OpenCVE: CVE-2026-69765 app.opencve.io
- Strix: CVE-2026-69765 www.strix.ai
- Tenable plugin 365473 (October 2026 Server 2025 update) www.tenable.com
- Vulners: NVD:CVE-2026-69765 vulners.com
- SonicWall: Microsoft security bulletin coverage for October 2026 www.sonicwall.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 31 Oct 2026, 19:04.
Original description (NVD)
Use after free in Windows Storport Miniport Driver 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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