CVE-2021-20090

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    CVE-2021-20090

    Published: 29 Apr 2021Last Modified: 10 Mar 2026

    Summary:

    Details: A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.

    References: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090, , https://www.kb.cert.org/vuls/id/914124, https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/, https://www.tenable.com/security/research/tra-2021-13

    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-2021-20090 | CVE-DB