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CVE-2026-27907

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-27907

Key Details

CVECVE-2026-27907
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-14
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
see table below
Classified as
CWE-191 (Integer Underflow (Wrap or Wraparound))

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 23H2)
MicrosoftWindows 11 (version 24H2)
MicrosoftWindows 11 (version 25H2)
MicrosoftWindows 11 (version 26H1)
MicrosoftWindows Server 2025
MicrosoftWindows Server 2022 (version 23H2)
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

What to Do

Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-27907
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-27907
Vendor advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907

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