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    CVE-2021-21869

    An unsafe deserialization vulnerability exists in the Engine.plugin ProfileInformation ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.

    Published:Aug 25, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 25, 2021
    EPSS Score:0.00105
    CVSS Score:7.8

    Affected Products

    Vendor
    Codesys
    Product
    Codesys

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1306https://talosintelligence.com/vulnerability_reports/TALOS-2021-1306

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

    Related CVEs

    CVE-2026-35227 (CVSS 8.2) — An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server …
    CVE-2025-41700 (CVSS 7.8) — An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately man…
    CVE-2021-34596 (CVSS 6.5) — A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit ful…
    CVE-2021-34595 (CVSS 8.1) — A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime T…
    CVE-2021-34586 (CVSS 7.5) — In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereferen…
    CVE-2021-34585 (CVSS 7.5) — In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since …
    CVE-2021-34584 (CVSS 9.1) — Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- s…
    CVE-2021-34583 (CVSS 7.5) — Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- se…
    CVE-2021-21868 (CVSS 7.8) — An unsafe deserialization vulnerability exists in the ObjectManager.plugin Project.get_MissingTypes() function…
    CVE-2021-21867 (CVSS 7.8) — An unsafe deserialization vulnerability exists in the ObjectManager.plugin ObjectStream.ProfileByteArray funct…

    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