CVE-2021-45338

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    CVE-2021-45338

    Published: 27 Dec 2021Last Modified: 10 Mar 2026

    Summary:

    Details: Multiple privilege escalation vulnerabilities in Avast Antivirus prior to 20.4 allow a local user to gain elevated privileges by calling unnecessarily powerful internal methods of the main antivirus service which could lead to the (1) arbitrary file delete, (2) write and (3) reset security.

    References: , https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0, https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.2, https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.3, https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1

    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-2021-45338 | CVE-DB