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CVE-2026-19259— MZ Automation libiec61850 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference heap-based overflow

Quick assessment

Affected
MZ Automation libiec61850
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.

Mz Automation libIEC61850是德国Mz Automation公司的一款用于电力系统通信的协议实现库。 Mz Automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于src/iec61850/common/iec61850_common.c文件中的MmsMapping_varAccessSpecToObjectReference函数对GetNamedVariableListAttributesResponse.itemId参数处理不当，导致堆缓冲

CVSS 5.3 · Medium EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 2

VendorProduct Version RangeStatus
MZ Automation libiec61850 1.6.0 affected
1.6.1 affected
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I. Basic Information for CVE-2026-19259

Vulnerability Information
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Vulnerability Title
MZ Automation libiec61850 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in MZ Automation libiec61850 up to 1.6.1. The affected element is the function MmsMapping_varAccessSpecToObjectReference of the file src/iec61850/common/iec61850_common.c of the component MMS Protocol Workflow. Such manipulation of the argument GetNamedVariableListAttributesResponse.itemId leads to heap-based buffer overflow. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Mz Automation libIEC61850 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mz Automation libIEC61850是德国Mz Automation公司的一款用于电力系统通信的协议实现库。 Mz Automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于src/iec61850/common/iec61850_common.c文件中的MmsMapping_varAccessSpecToObjectReference函数对GetNamedVariableListAttributesResponse.itemId参数处理不当，导致堆缓冲
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MZ Automation libiec61850 1.6.0 cpe:2.3:a:mz_automation:libiec61850:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19259

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III. Intelligence Information for CVE-2026-19259

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Vendor Advisories for CVE-2026-19259 (2)

Proof of Concept for CVE-2026-19259 (1)

News Coverage for CVE-2026-19259 (1)

Other References for CVE-2026-19259 (1)

IV. Related Vulnerabilities

Same product: libiec61850
Same vendor: MZ Automation
Same weakness: CWE-122

V. Comments for CVE-2026-19259

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