CVE-2026-19259: Heap-based Buffer Overflow in MZ Automation libiec61850
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.
AI Analysis
Technical Summary
CVE-2026-19259 is a heap-based buffer overflow vulnerability found in MZ Automation libiec61850 up to version 1.6.1. The issue occurs in the function MmsMapping_varAccessSpecToObjectReference located in src/iec61850/common/iec61850_common.c, specifically within the MMS Protocol Workflow component. Improper manipulation of the argument GetNamedVariableListAttributesResponse.itemId can trigger the overflow. The attack vector is local with low complexity and no user interaction required. Although the vulnerability is publicly disclosed, the vendor has not yet provided a fix or official remediation guidance.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption due to heap-based buffer overflow, potentially causing application crashes or arbitrary code execution under local attack conditions. The CVSS score of 4.8 indicates a medium severity impact with limited attack vector scope and privileges required.
Mitigation Recommendations
No official fix or patch is currently available from the vendor. Since the vulnerability requires local access, restricting local user privileges and monitoring for suspicious local activity may reduce risk. Check the vendor advisory regularly for updates or patches. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-19259: Heap-based Buffer Overflow in MZ Automation libiec61850
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.
CVSS v4.0
Score 4.8medium
Affected software
MZ Automation
libiec61850
pkg:github/mz-automation/libiec61850cpe:2.3:a:mz_automation:libiec61850:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19259 is a heap-based buffer overflow vulnerability found in MZ Automation libiec61850 up to version 1.6.1. The issue occurs in the function MmsMapping_varAccessSpecToObjectReference located in src/iec61850/common/iec61850_common.c, specifically within the MMS Protocol Workflow component. Improper manipulation of the argument GetNamedVariableListAttributesResponse.itemId can trigger the overflow. The attack vector is local with low complexity and no user interaction required. Although the vulnerability is publicly disclosed, the vendor has not yet provided a fix or official remediation guidance.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption due to heap-based buffer overflow, potentially causing application crashes or arbitrary code execution under local attack conditions. The CVSS score of 4.8 indicates a medium severity impact with limited attack vector scope and privileges required.
Mitigation Recommendations
No official fix or patch is currently available from the vendor. Since the vulnerability requires local access, restricting local user privileges and monitoring for suspicious local activity may reduce risk. Check the vendor advisory regularly for updates or patches. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-07T13:56:48.293Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a76cc2cbf8831d539114787
Added to database: 08/08/2026, 06:26:52 UTC
Last enriched: 08/15/2026, 15:31:59 UTC
Last updated: 09/22/2026, 01:54:34 UTC
Views: 67
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