Auth bypass in Microsoft On-Prem Data Gateway
CVE-2025-21403
On-Premises Data Gateway Information Disclosure Vulnerability
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Microsoft On-Prem Data Gateway
- Microsoft On-Premises Data Gateway — versions 1.0.0
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21403 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-21403?
- CVE-2025-21403 is a medium-severity vulnerability in Microsoft On-Prem Data Gateway, classified under Incorrect Authorization. CVSS score: 6.4/10. Published 2025-01-14.
- How severe is CVE-2025-21403?
- Medium severity. CVSS v3 base score is 6.4 out of 10.