PT-2026-32769 · Microsoft · Windows Storage Spaces Controller+1

Kang Minchae + 5 · CVE-2026-27907 · Published 2026-04-14 · Updated 2026-04-17

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows Storage Spaces Controller (affected versions not specified)

Description An integer underflow (wrap or wraparound) occurs in the Windows Storage Spaces Controller, which allows an authorized attacker to elevate privileges locally.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

BDU:2026-05439

CVE-2026-27907

Affected Products

Windows

Windows Storage Spaces Controller

References · 6

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27907 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27907 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27907 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-27907 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05439 · Security Note
• https://twitter.com/CVEnew/status/2045112981479194800 · Twitter Post