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    CVE-2026-25823

    HMS Networks Ewon Flexy with firmware before 15.0s4, Cosy+ with firmware 22.xx before 22.1s6, and Cosy+ with firmware 23.xx before 23.0s3 have a stack buffer overflow that leads to a Denial of Service, which can also be exploited to achieve Unauthenticated Remote Code Execution.

    Published:Mar 12, 2026
    Last Modified:Mar 20, 2026
    EPS:Mar 12, 2026
    EPSS Score:0.00256
    CVSS Score:9.8

    Affected Products

    Vendor
    Hms-networks
    Product
    Ewon Cosy
    Vendor
    Hms-networks
    Product
    Ewon Flexy

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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