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    CVE-2026-38719

    OpENer v2.3-558-g1e99582 contains an out-of-bounds read vulnerability in the Common Packet Format (CPF) parser, specifically in CreateCommonPacketFormatStructure() in source/src/enet_encap/cpf.c. A crafted ENIP/CPF message can supply an attacker-controlled item_count value that is not consistently validated against the remaining data_length of the CPF slice

    Published:May 18, 2026
    Last Modified:May 19, 2026
    EPS:May 18, 2026
    EPSS Score:
    CVSS Score:6.2

    Affected Products

    Vendor
    Eipstackgroup
    Product
    Opener

    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-2026-51541 (CVSS 9.1) — OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed e…
    CVE-2026-51537 (CVSS 9.1) — EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of …
    CVE-2026-51538 (CVSS 9.1) — EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its hand…
    CVE-2026-51536 (CVSS 9.1) — In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol) network packets, the l…
    CVE-2026-51540 (CVSS 9.8) — OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by …
    CVE-2026-51535 (CVSS 7.5) — In OpENer 2.3.0 (commit 76b95cf), a resource exhaustion (Denial of Service) vulnerability exists in its networ…
    CVE-2026-51221 (CVSS 7.5) — A buffer overflow in the Get_Attribute_List function of EIPStackGroup OpENer commit 76b95c allows attackers to…
    CVE-2026-10703 (CVSS 2.1) — A security vulnerability has been detected in EIPStackGroup OpENer up to 2.3.0. Affected is the function Creat…

    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