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    CVE-2026-23759

    Perle IOLAN STS/SCS terminal server models with firmware versions prior to 6.0 allow authenticated OS command injection via the restricted shell accessed over Telnet or SSH. The shell 'ps' command does not perform proper argument sanitization and passes user-supplied parameters into an 'sh -c' invocation running as root. An authenticated attacker who can log in to the device can inject shell metacharacters after the 'ps' subcommand to execute arbitrary OS commands with root privileges, leading to full compromise of the underlying operating system.

    Published:Mar 17, 2026
    Last Modified:Mar 24, 2026
    EPS:Mar 17, 2026
    EPSS Score:0.00201
    CVSS Score:7.2

    Affected Products

    Vendor
    Perle Systems
    Product
    Iolan Scs
    Vendor
    Perle Systems
    Product
    Iolan Sts

    Exploits

    No exploit reference

    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