PT-2026-58228 · Microsoft · Hyper-V

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-54127

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Hyper-V (affected versions not specified)

Description A use after free issue exists in Windows Hyper-V, which could allow an unauthorized attacker to elevate privileges locally. Use after free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed, potentially leading to arbitrary code execution or privilege escalation.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-54127

Affected Products

Hyper-V

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54127 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54127 · Security Note
• https://twitter.com/windowsforum/status/2077186161164910949 · Twitter Post