CVE-2021-27657

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    CVE-2021-27657

    Published: 4 Jun 2021Last Modified: 10 Mar 2026

    Summary:

    Details: Successful exploitation of this vulnerability could give an authenticated Metasys user an unintended level of access to the server file system, allowing them to access or modify system files by sending specifically crafted web messages to the Metasys system. This issue affects: Johnson Controls Metasys version 11.0 and prior versions.

    References: , https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01, https://us-cert.gov/ics/advisories, https://www.johnsoncontrols.com/cyber-solutions/security-advisories

    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-2021-27657 | CVE-DB