What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-08 · updated 2026-10-23
• Weakness: CWE-119

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.

Affected products

• mz-automation libiec61850: 1.6.0, 1.6.1

References

• https://github.com/mz-automation/libiec61850/issues/599
• https://github.com/user-attachments/files/29190426/PoC.zip
• https://vuldb.com/cve/CVE-2026-19259
• https://vuldb.com/submit/865176
• https://vuldb.com/vuln/387009
• https://vuldb.com/vuln/387009/cti

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