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    CVE-2025-6338

    There is an incomplete cleanup vulnerability in Qt Network's Schannel support on Windows which can lead to a Denial of Service over a long period. This issue affects Qt from 5.15.0 through 6.8.3, from 6.9.0 before 6.9.2.

    Published:Oct 16, 2025
    Last Modified:Jul 29, 2026
    EPS:Oct 16, 2025
    EPSS Score:0.0043
    CVSS Score:9.2

    Affected Products

    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Qt
    Product
    Qt

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-459 Incomplete Cleanup

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High