CVE-2025-30038: Session ID leakage in Zone.Identifier of downloaded files

Published Aug 27, 2025
·
Updated

The vulnerability consists of a session ID leak when saving a file downloaded from CGM CLININET. The identifier is exposed through a built-in Windows security feature that stores additional metadata in an NTFS alternate data stream (ADS) for all files downloaded from potentially untrusted sources.

Affected Software

2 affected components
Microsoft Windows
CGM CLININET

Event History

Aug 27, 2025
CVE Published
via MITRE·10:20 AM
Data Sourced
via MITRE·10:20 AM
DescriptionWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeakness

Frequently Asked Questions

1

What is the severity of CVE-2025-30038?

CVE-2025-30038 is considered a medium severity vulnerability due to the potential for session ID leakage.

2

How do I fix CVE-2025-30038?

To mitigate CVE-2025-30038, ensure that files downloaded from CGM CLININET are handled securely and consider applying security updates from Microsoft.

3

What types of systems are affected by CVE-2025-30038?

CVE-2025-30038 affects systems running Microsoft Windows and CGM CLININET software.

4

What data is exposed in CVE-2025-30038?

CVE-2025-30038 exposes session IDs through NTFS alternate data streams when files are downloaded.

5

Is there a known exploit for CVE-2025-30038?

As of now, there are no publicly known exploits specifically targeting CVE-2025-30038.

Contact

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