---
id: CVE-2026-78049
title: A vulnerability has been found in Systerel S2OPC up to 1.7.3
summary: >-
  A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the
  function SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes of the file
  src/ClientServer/address_space/internal/sopc_node_mgt_helper_internal.c of the
  compon…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-119
  - CWE-125
published: '2026-08-22'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T16:10:00.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78049'
references:
  - url: 'https://github.com/user-attachments/files/29702766/PoC.zip'
    label: cna@vuldb.com
  - url: >-
      https://gitlab.com/systerel/S2OPC/-/commit/aafbd37d381b618312ebdf5ddf57027f62c14fdd
    label: cna@vuldb.com
  - url: 'https://gitlab.com/systerel/S2OPC/-/merge_requests/1826'
    label: cna@vuldb.com
  - url: 'https://gitlab.com/systerel/S2OPC/-/work_items/1787'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-78049'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/881262'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/394290'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/394290/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00624
epssPercentile: 0.48425
ingestedAt: '2026-10-12T16:57:59.885Z'
---

## Overview

A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes of the file src/ClientServer/address_space/internal/sopc_node_mgt_helper_internal.c of the component AddNodes Service. The manipulation of the argument UserAccessLevel leads to out-of-bounds read. It is possible to initiate the attack remotely. A high degree of complexity is needed for the attack. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The identifier of the patch is aafbd37d381b618312ebdf5ddf57027f62c14fdd. It is suggested to install a patch to address this issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.