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    CVE-2020-15791

    A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.

    Published:Sep 9, 2020
    Last Modified:Jun 2, 2026
    EPS:Sep 9, 2020
    EPSS Score:0.00081
    CVSS Score:6.5

    Affected Products

    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 312
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 312 Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 314
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 314 Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315-2 Dp
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315-2 Dp Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315-2 Pn
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315-2 Pn Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315f-2 Dp
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315f-2 Dp Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315f-2 Pn
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 315f-2 Pn Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317-2 Dp
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317-2 Dp Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317-2 Pn
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317-2 Pn Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317f-2 Dp
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317f-2 Dp Firmware
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317f-2 Pn
    Vendor
    Siemens
    Product
    Simatic S7-300 Cpu 317f-2 Pn Firmware
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 412
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 412 Firmware
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 414
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 414 Firmware
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 416
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 416 Firmware
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 417
    Vendor
    Siemens
    Product
    Simatic S7-400 Cpu 417 Firmware

    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