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    CVE-2026-90782

    S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.

    Published:Sep 13, 2026
    Last Modified:Sep 14, 2026
    EPS:Sep 13, 2026
    EPSS Score:0.0032
    CVSS Score:5.3

    Affected Products

    Vendor
    Systerel
    Product
    S2opc

    Exploits

    https://github.com/HarshRajSinghania/CVE-2026-90782-s2opc-status-clobber

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-82619 (CVSS 2.1) — A vulnerability was identified in Systerel S2OPC up to 1.7.3. The impacted element is the function monitored_i…
    CVE-2026-82618 (CVSS 5.3) — A vulnerability was determined in Systerel S2OPC up to 1.7.3. The affected element is the function set_range_m…
    CVE-2026-78049 (CVSS 2.9) — A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPC_NodeMgtHelperInter…
    CVE-2026-67868 (CVSS 9.8) — A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling durin…
    CVE-2026-67867 (CVSS 7.5) — Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service vi…
    CVE-2026-67865 (CVSS 7.5) — S2OPC 1.7.3 contains an out-of-bounds read in RepublishResponse handling. This allows a remote attacker to cau…
    CVE-2026-67871 (CVSS 7.5) — Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service vi…
    CVE-2026-67872 (CVSS 7.5) — An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored…
    CVE-2026-67866 (CVSS 7.5) — Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service vi…
    CVE-2026-18790 (CVSS 1.9) — A weakness has been identified in Systerel S2OPC up to 1.7.3. This affects the function LockedStaMac_ProcessMs…

    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