CVE Feed

    Dashboard / CVE / CVE-2026-9621

    CVE-2026-9621

    A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover

    Published:Sep 1, 2026
    Last Modified:Sep 1, 2026
    EPS:Sep 1, 2026
    EPSS Score:
    CVSS Score:9.2

    Affected Products

    Vendor
    Rockwell Automation
    Product
    Rslinx Classic
    Vendor
    Rockwellautomation
    Product
    Rslinx Classic

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    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