CVE-2025-21403: On-Premises Data Gateway Information Disclosure Vulnerability

Q: How do I fix CVE-2025-21403?

on-prem data gateway: upgrade to 3000.246. Exact commands for each OS are on this page.

Q: Is CVE-2025-21403 being exploited?

CVE-2025-21403 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-21403 affect?

CVE-2025-21403 affects on-prem data gateway. Severity is medium (CVSS 6.4). On-Premises Data Gateway Information Disclosure Vulnerability

Q: How urgent is CVE-2025-21403?

Priority 39/100. On your watchlist

Routine

MEDIUM 6.4WATCHLISTUPGRADE

CVE-2025-21403 is a medium-severity flaw (CVSS 6.4) affecting on-prem data gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

On-Premises Data Gateway Information Disclosure Vulnerability

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-863
Published	2025-01-14
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-01-14 18:16 UTCPublished CVE record published
2026-06-17 08:43 UTCUpdated Record last modified

microsoft on-prem data gateway UPGRADE

Affected: < 3000.246

Fixed in: 3000.246

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy on-prem-data-gateway || rpm -q on-prem-data-gateway || on-prem-data-gateway --version

2. UPGRADE to 3000.246 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade on-prem-data-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade on-prem-data-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-21403?

on-prem data gateway: upgrade to 3000.246. Exact commands for each OS are on this page.

Is CVE-2025-21403 being exploited?

CVE-2025-21403 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-21403 affect?

CVE-2025-21403 affects on-prem data gateway. Severity is medium (CVSS 6.4). On-Premises Data Gateway Information Disclosure Vulnerability

How urgent is CVE-2025-21403?

Priority 39/100. On your watchlist

References

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