CVE-2025-30391: Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a

This month

HIGH 8.1REMOTEWATCHLISTMITIGATE

CVE-2025-30391 is a high-severity flaw (CVSS 8.1) affecting dynamics 365 customer service. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a network.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-20
Published	2025-04-30
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

2025-04-30 18:15 UTCPublished CVE record published
2026-06-17 09:08 UTCUpdated Record last modified

microsoft dynamics 365 customer service MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dynamics-365-customer-service || rpm -q dynamics-365-customer-service || dynamics-365-customer-service --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2025-30391?

dynamics 365 customer service: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-30391 being exploited?

CVE-2025-30391 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-2025-30391 affect?

CVE-2025-30391 affects dynamics 365 customer service. Severity is high (CVSS 8.1). Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a network.

How urgent is CVE-2025-30391?

Priority 56/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

References

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