PT-2026-58229 · Microsoft · Hyper-V

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-54129

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/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 allows an authorized attacker to elevate privileges locally. This flaw can enable an attacker with low-privilege access to gain full control over the host system. 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.

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-2026-54129

Affected Products

Hyper-V

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-54129 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54129 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077127528792125668 · Twitter Post
• https://twitter.com/windowsforum/status/2077126791932608564 · Twitter Post