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CVE-2026-78049— Systerel S2OPC AddNodes Service sopc_node_mgt_helper_internal.c out-of-bounds

Quick assessment

Affected
Systerel S2OPC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Systerel S2OPC（最高至 1.7.3 版本）中发现一个漏洞。受影响的组件是 AddNodes 服务，具体位于文件 中的函数 。该漏洞源于对用户访问级别（UserAccessLevel）参数的不当处理，可导致越界读取错误。 攻击者可远程发起攻击，但攻击复杂度较高，可利用难度较大。该漏洞的利用代码已公开披露，可能存在被实际利用的风险。 修复该漏洞的补丁标识为： 。建议尽快安装该补丁以解决此安全问题。

CVSS 3.7 · Low EPSS 0.62% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
Systerel S2OPC 1.7.0 affected
1.7.1 affected
1.7.2 affected
1.7.3 affected
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I. Basic Information for CVE-2026-78049

Vulnerability Information
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Vulnerability Title
Systerel S2OPC AddNodes Service sopc_node_mgt_helper_internal.c out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Systerel S2OPC 1.7.0 cpe:2.3:a:systerel:s2opc:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-78049

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III. Intelligence Information for CVE-2026-78049

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Patches & Fixes for CVE-2026-78049 (3)

Vendor Advisories for CVE-2026-78049 (1)

News Coverage for CVE-2026-78049 (1)

Other References for CVE-2026-78049 (1)

Other References for CVE-2026-78049 (1)

IV. Related Vulnerabilities

Same product: S2OPC
Same vendor: Systerel
Same weakness: CWE-125

V. Comments for CVE-2026-78049

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