---
id: CVE-2026-19259
title: A vulnerability has been found in MZ Automation libiec61850 up to 1.6.1
summary: >-
  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
  Workf…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-119
  - CWE-122
published: '2026-08-08'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19259'
references:
  - url: 'https://github.com/mz-automation/libiec61850/issues/599'
    label: cna@vuldb.com
  - url: 'https://github.com/user-attachments/files/29190426/PoC.zip'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-19259'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/865176'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387009'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387009/cti'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00172
epssPercentile: 0.0579
ingestedAt: '2026-08-09T03:32:40.721Z'
---

## Overview

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.

## Remediation

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