What is the CVSS score of CVE-2025-21403?

CVE-2025-21403 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of On Prem Data Gateway are affected by CVE-2025-21403?

CVE-2025-21403 presents moderate security risk, a incorrect authorization vulnerability rated CVSS 6.4. Attackers could gain access beyond their authorized level.. A patch is available.

How to fix or mitigate CVE-2025-21403?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

On Prem Data Gateway CVE-2025-21403

MEDIUM

Incorrect Authorization (CWE-863)

2025-01-14 secure@microsoft.com

Authentication Bypass Information Disclosure On Prem Data Gateway

6.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.4 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:03 vuln.today

Patch released

Mar 28, 2026 - 18:03 nvd

Patch available

CVE Published

Jan 14, 2025 - 18:16 nvd

MEDIUM 6.4

DescriptionCVE.org

On-Premises Data Gateway Information Disclosure Vulnerability

AnalysisAI

On-Premises Data Gateway Information Disclosure Vulnerability. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.

Technical ContextAI

This vulnerability is classified as Incorrect Authorization (CWE-863), which allows attackers to bypass authorization checks to access restricted resources. On-Premises Data Gateway Information Disclosure Vulnerability Affected products include: Microsoft On-Prem Data Gateway.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Review and test authorization logic, implement consistent access control checks, use centralized authorization framework.