CVE-2026-19259
MZ Automation libiec61850 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference heap-based overflow
- State
- Published
- Severity
- 4.8 Medium
- Published
- Aug 8, 2026
- Updated
- Aug 10, 2026
- Reserved
- Aug 7, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 5.3 Medium | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 4.3 Medium | AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libiec61850MZ Automation |
|
References
- VDB-387009 | MZ Automation libiec61850 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference heap-based overflowvdb-entrytechnical-description
- VDB-387009 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-19259 | CVE Analysis and Reportthird-party-advisory
- Submit #865176 | MZ Automation libiec61850 1.6.1 Memory Corruption (Out-of-bounds Read)third-party-advisory
- https://github.com/mz-automation/libiec61850/issues/599issue-tracking
- https://github.com/user-attachments/files/29190426/PoC.zipexploit
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