Microsoft Windows Storage Spaces Controller: Remote code execution (unconfirmed)
Summary
CVE-2026-119908 is an integer underflow (CWE-191) in the Windows Storage Spaces Controller, according to the CVE record. The CNA describes it as allowing code execution over a network without authentication, with a CVSS 3.1 score of 8.8. Independent research could not verify these details, and the vector in the CVE record requires user interaction (UI:R), so the attack conditions are not yet confirmed. The MSRC advisory and NVD analysis had not been retrieved at the time of writing.
Affected
- Windows 11 version 23H2: 10.0.22631.0 to before 10.0.22631.7711
- Windows 11 version 24H2: 10.0.26100.0 to before 10.0.26100.9974
- Windows 11 version 25H2: 10.0.26200.0 to before 10.0.26200.9974
- Windows 11 version 26H1: 10.0.28000.0 to before 10.0.28000.3501
- Windows 11 version 26H2: 10.0.26300.0 to before 10.0.26300.9974
- Windows Server 2022: 10.0.20348.0 to before 10.0.20348.5870
- Windows Server 2025 (including Server Core): 10.0.26100.0 to before 10.0.26100.33822
Source: CVE record. Not yet verified against the MSRC advisory.
Fixed in
- Windows 11 23H2: 10.0.22631.7711 or later
- Windows 11 24H2: 10.0.26100.9974 or later
- Windows 11 25H2: 10.0.26200.9974 or later
- Windows 11 26H1: 10.0.28000.3501 or later
- Windows 11 26H2: 10.0.26300.9974 or later
- Windows Server 2022: 10.0.20348.5870 or later
- Windows Server 2025: 10.0.26100.33822 or later
KB article: Unknown.
Workaround
Unknown for this CVE. For a related CVE, a provisional measure is to disable or uninstall the Storage Spaces Controller feature where it is not needed. Check first that this does not affect your storage setup.
Exploitation
- Publicly disclosed: Unknown.
- Exploited in the wild: Unknown.
- CISA SSVC: Exploitation none, automatable no, technical impact total.
Our recommendation
- Check the MSRC advisory and NVD once they are indexed, and confirm the attack vector, privileges and user interaction.
- Inventory hosts with Windows Server or Windows 10/11 that use the Storage Spaces Controller feature, and prioritise those reachable from untrusted networks.
- Apply the Microsoft update in the next maintenance window, or earlier if the network attack vector is confirmed.
- Disable the feature where it is not required, after checking the storage setup.
- Monitor for public proof-of-concept code or exploitation reports.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Remote code execution – Windows Storage Spaces Controller
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows
- Updates (KB)
- KB5131090, KB5131087, KB5132061, KB5132043, KB5131080, KB5131077
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- MSRC Security Update Guide: CVE-2026-119908 msrc.microsoft.com
- MSRC Advisory: CVE-2026-68844 (sibling) msrc.microsoft.com
- OpenCVE: CVE-2026-68844 (sibling) app.opencve.io
- SentinelOne: Storage Spaces Controller CVE-2026-35415 www.sentinelone.com
- MSRC: CVE-2026-87716 (sibling, DoS) msrc.microsoft.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 10 Nov 2026, 20:26.
Original description (NVD)
Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller 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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