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  • Rockwell Automation RSLinx

    From CISA Advisories@2:263/1 to All on Tue Jun 16 17:11:05 2026
    Rockwell Automation RSLinx

    View CSAF
    Summary
    Successful exploitation of this vulnerability can lead to a denial of service, where the application will become unresponsive and will not recover on its own.
    The following versions of RSLinx Classic Third-Party Vulnerability are affected:

    RSLinx Classic <=4.50.00 (CVE-2020-13573)





    CVSS
    Vendor
    Equipment
    Vulnerabilities




    v3 7.5
    Rockwell Automation
    RSLinx Classic Third-Party Vulnerability
    Out-of-bounds Read




    Background

    Critical Infrastructure Sectors: Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater
    Countries/Areas Deployed: Worldwide
    Company Headquarters Location: United States


    Vulnerabilities

    Expand All +

    CVE-2020-13573

    The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code.
    View CVE Details

    Affected Products
    RSLinx Classic Third-Party Vulnerability

    Vendor:Rockwell Automation
    Product Version:Rockwell Automation RSLinx Classic: <=4.50.00
    Product Status:known_affected


    Remediations
    MitigationRockwell Automation recommends that customers using the affected software should upgrade to version 4.60.00 or later. Customers who are not able to upgrade to one of the corrected versions, should consider applying the available patch (BF31213) for their current version or applying the recommended security best practices.https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1774.html

    Relevant CWE: CWE-125 Out-of-bounds Read

    Metrics




    CVSS Version
    Base Score
    Base Severity
    Vector String




    3.1
    7.5
    HIGH
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


    4.0
    8.7
    HIGH
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N








    Acknowledgments

    Rockwell Automation reported this vulnerability to CISA


    Legal Notice and Terms of Use
    This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).

    Recommended Practices
    CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.
    Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
    Locate control system networks and remote devices behind firewalls and isolating them from business networks.
    When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
    CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
    CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
    CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
    Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
    Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
    CISA also recommends users take the following measures to protect themselves from social engineering attacks:
    Do not click web links or open attachments in unsolicited email messages.
    Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
    Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
    No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

    Revision History

    Initial Release Date: 2026-06-16




    Date
    Revision
    Summary




    2026-06-16
    1
    Initial Republication of Rockwell Automation Advisory SD1774




    Legal Notice and Terms of Use

    https://www.cisa.gov/news-events/ics-advisories/icsa-26-167-02

    2026-06-16 12:00 UTC
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