CVE-2021-33436

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    CVE-2021-33436

    Published: 28 Apr 2022Last Modified: 10 Mar 2026

    Summary:

    Details: NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\SYSTEM.

    References: , https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.md, https://knowledgebase.nomachine.com/SU05S00223, https://knowledgebase.nomachine.com/SU05S00224, https://knowledgebase.nomachine.com/TR05S10236

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-33436 | CVE-DB