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    CVE-2021-31881

    A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303). When processing a DHCP OFFER message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0008)

    Published:Nov 9, 2021
    Last Modified:Mar 11, 2025
    EPS:Nov 9, 2021
    EPSS Score:0.01414
    CVSS Score:7.1

    Affected Products

    Vendor
    Siemens
    Product
    Apogee Modular Building Controller
    Vendor
    Siemens
    Product
    Apogee Modular Building Controller Firmware
    Vendor
    Siemens
    Product
    Apogee Modular Equiment Controller
    Vendor
    Siemens
    Product
    Apogee Modular Equiment Controller Firmware
    Vendor
    Siemens
    Product
    Apogee Pxc Compact
    Vendor
    Siemens
    Product
    Apogee Pxc Compact Firmware
    Vendor
    Siemens
    Product
    Apogee Pxc Modular
    Vendor
    Siemens
    Product
    Apogee Pxc Modular Firmware
    Vendor
    Siemens
    Product
    Capital Vstar
    Vendor
    Siemens
    Product
    Nucleus Net
    Vendor
    Siemens
    Product
    Nucleus Readystart V3
    Vendor
    Siemens
    Product
    Nucleus Source Code
    Vendor
    Siemens
    Product
    Talon Tc Compact
    Vendor
    Siemens
    Product
    Talon Tc Compact Firmware
    Vendor
    Siemens
    Product
    Talon Tc Modular
    Vendor
    Siemens
    Product
    Talon Tc Modular Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2022-38371 (CVSS 8.7) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31890 (CVSS 7.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31889 (CVSS 7.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31887 (CVSS 8.8) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31888 (CVSS 8.8) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31886 (CVSS 9.8) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31885 (CVSS 7.5) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31884 (CVSS 9.8) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31883 (CVSS 7.1) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31882 (CVSS 6.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…

    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