CVE-2025-30038

Session ID leakage in Zone.Identifier of downloaded files

HIGH
7.3
CVSS Score
Published: August 27, 2025 at 10:20 AM UTC
Updated: June 17, 2026 at 09:08 AM UTC
1 product affected across 1 vendorCLININET

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Severity
HIGH7.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2025.MS1
Affected range stops below 2025.MS1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1230

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