CVE-2026-19259: Heap-based Buffer Overflow in MZ Automation libiec61850
CVE-2026-19259 is a heap-based buffer overflow vulnerability in MZ Automation libiec61850 versions 1.6.0 and 1.6.1. It occurs in the function MmsMapping_varAccessSpecToObjectReference within the MMS Protocol Workflow component when handling the argument GetNamedVariableListAttributesResponse.itemId. Exploitation requires local access and no user interaction. The vulnerability has been publicly disclosed, but the vendor has not yet responded or issued a fix.
AI Analysis
Technical Summary
This vulnerability affects MZ Automation libiec61850 up to version 1.6.1, specifically in the function MmsMapping_varAccessSpecToObjectReference in the file iec61850_common.c. Improper handling of the GetNamedVariableListAttributesResponse.itemId argument can lead to a heap-based buffer overflow. The attack vector is local with low complexity and requires low privileges. The vulnerability has been publicly disclosed, but no official patch or remediation has been provided by the vendor as of the publication date.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption due to a heap-based buffer overflow, potentially causing application crashes or arbitrary code execution under local attack conditions. However, the CVSS score of 4.8 indicates a medium severity impact, reflecting limited attack scope and complexity.
Mitigation Recommendations
No official fix or patch is currently available from the vendor. Since the vulnerability requires local access, restricting local user privileges and access to the affected software may reduce risk. Monitor vendor channels 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
CVE-2026-19259 is a heap-based buffer overflow vulnerability in MZ Automation libiec61850 versions 1.6.0 and 1.6.1. It occurs in the function MmsMapping_varAccessSpecToObjectReference within the MMS Protocol Workflow component when handling the argument GetNamedVariableListAttributesResponse.itemId. Exploitation requires local access and no user interaction. The vulnerability has been publicly disclosed, but the vendor has not yet responded or issued a fix.
CVSS v4.0
Score 4.8medium
Affected software
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
This vulnerability affects MZ Automation libiec61850 up to version 1.6.1, specifically in the function MmsMapping_varAccessSpecToObjectReference in the file iec61850_common.c. Improper handling of the GetNamedVariableListAttributesResponse.itemId argument can lead to a heap-based buffer overflow. The attack vector is local with low complexity and requires low privileges. The vulnerability has been publicly disclosed, but no official patch or remediation has been provided by the vendor as of the publication date.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption due to a heap-based buffer overflow, potentially causing application crashes or arbitrary code execution under local attack conditions. However, the CVSS score of 4.8 indicates a medium severity impact, reflecting limited attack scope and complexity.
Mitigation Recommendations
No official fix or patch is currently available from the vendor. Since the vulnerability requires local access, restricting local user privileges and access to the affected software may reduce risk. Monitor vendor channels 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
- Remediation Level
- null
Threat ID: 6a76cc2cbf8831d539114787
Added to database: 08/08/2026, 06:26:52 UTC
Last enriched: 08/08/2026, 06:46:32 UTC
Last updated: 08/08/2026, 06:58:27 UTC
Views: 4
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