PT-2025-1243 · Microsoft · Windows Virtualization-Based Security (Vbs) Enclave+1

Alex Ionescu · Published 2025-01-14 · Updated 2026-04-13 · CVE-2025-21370

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Virtualization-Based Security (VBS) Enclave (affected versions not specified)

Description The issue is related to insufficient input validation in the Virtualization-Based Security (VBS) Enclave of Microsoft Windows operating systems. This can allow an attacker to elevate their privileges.

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

LPE

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2025-00635

CVE-2025-21370

Affected Products

Windows

Windows Virtualization-Based Security (Vbs) Enclave

References · 9

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21370 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21370 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21370 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-00635 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21370 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21370 · Security Note
• https://twitter.com/dailycve/status/1880285858278043713 · Twitter Post
• https://twitter.com/CVEnew/status/1879290754612269080 · Twitter Post
• https://twitter.com/rahsi_aaka/status/2043735347734163862 · Twitter Post