PT-2025-20949 · Microsoft · Windows Virtual Machine Bus+1

Chief Banana · Published 2025-05-13 · Updated 2025-05-13 · CVE-2025-29833

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Windows Virtual Machine Bus (affected versions not specified)

Description: A time-of-check time-of-use (toctou) race condition exists, allowing an authorized attacker to execute code over a network. This issue enables remote attackers to execute arbitrary code and affect the system.

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

RCE

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

BDU:2025-05447

CVE-2025-29833

Affected Products

Windows

Windows Virtual Machine Bus

References · 7

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-29833 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-29833 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-29833 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29833 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-05447 · Security Note
• https://osv.dev/vulnerability/CVE-2025-29833 · Vendor Advisory
• https://twitter.com/CVEnew/status/1922339807185010765 · Twitter Post