CVE-2026-19259 Details
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.
A heap-based buffer overflow vulnerability has been identified in MZ Automation libiec61850 versions through 1.6.1. The issue arises in the MMS Protocol Workflow component, specifically within the function MmsMapping_varAccessSpecToObjectReference in the file src/iec61850/common/iec61850_common.c. The vulnerability is triggered by manipulating the GetNamedVariableListAttributesResponse.itemId argument, leading to a heap-based buffer overflow. This vulnerability requires local exploitation.
Users are advised to update to the latest version of libIEC61850, where this vulnerability has been addressed. The official GitHub repository contains the patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 8, 2026CISA-ADP
Assessed Aug 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/mz-automation/libiec61850/issues/599 | [email protected] | ExploitIssue TrackingTechnical AnalysisVendor |
| https://github.com/user-attachments/files/29190426/PoC.zip | [email protected] | Broken LinkExploit |
| https://vuldb.com/cve/CVE-2026-19259 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/865176 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/387009 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/387009/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| MZ Automation libiec61850 | <= 1.6.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 10, 2026 | CVE Modified | CISA-ADP |
| Aug 8, 2026 | New CVE Received | [email protected] |