What is the CVSS score of CVE-2025-21416?

CVE-2025-21416 has a CVSS 3.1 base score of 8.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Azure Virtual Desktop are affected by CVE-2025-21416?

Organizations using Missing authorization in Azure Virtual Desktop face significant risk from CVE-2025-21416, a missing authorization vulnerability rated CVSS 8.5.

How to fix or mitigate CVE-2025-21416?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Azure Virtual Desktop CVE-2025-21416

HIGH

Missing Authorization (CWE-862)

2025-04-30 secure@microsoft.com

Microsoft Authentication Bypass Azure Virtual Desktop

8.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

CVE Published

Apr 30, 2025 - 18:15 nvd

HIGH 8.5

DescriptionCVE.org

Missing authorization in Azure Virtual Desktop allows an authorized attacker to elevate privileges over a network.

AnalysisAI

Missing authorization in Azure Virtual Desktop allows an authorized attacker to elevate privileges over a network. Rated high severity (CVSS 8.5), this vulnerability is remotely exploitable. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. Missing authorization in Azure Virtual Desktop allows an authorized attacker to elevate privileges over a network. Affected products include: Microsoft Azure Virtual Desktop.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.