CVE-2026-19206: Heap-based Buffer Overflow in MZ Automation libiec61850
A security flaw has been discovered in MZ Automation libiec61850 up to 1.6.1. This affects the function SVReceiver_stopThreadless of the file src/sampled_values/sv_subscriber.c of the component ASDU Element Handler. Performing a manipulation results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to mitigate this issue. The patch is named a96bd674e0238276dd1387d31d52e55229d0771e. The affected component should be upgraded.
AI Analysis
Technical Summary
CVE-2026-19206 is a heap-based buffer overflow vulnerability in the SVReceiver_stopThreadless function within the src/sampled_values/sv_subscriber.c file of the ASDU Element Handler component in MZ Automation libiec61850. The flaw affects versions 1.6.0 and 1.6.1. Exploitation requires local access and can cause memory corruption due to improper handling of buffer boundaries. A public exploit is available. The issue is resolved by upgrading to version 1.6.2, which includes a patch identified by commit a96bd674e0238276dd1387d31d52e55229d0771e.
Potential Impact
Successful exploitation of this vulnerability can lead to heap-based buffer overflow, potentially causing application crashes or arbitrary code execution. However, exploitation requires local access, limiting remote attack vectors. The CVSS 4.8 (medium) score reflects the moderate impact and attack complexity.
Mitigation Recommendations
Upgrade affected installations of MZ Automation libiec61850 from versions 1.6.0 or 1.6.1 to version 1.6.2, which contains the official patch addressing this vulnerability. No other mitigations are specified or required.
CVE-2026-19206: Heap-based Buffer Overflow in MZ Automation libiec61850
Description
A security flaw has been discovered in MZ Automation libiec61850 up to 1.6.1. This affects the function SVReceiver_stopThreadless of the file src/sampled_values/sv_subscriber.c of the component ASDU Element Handler. Performing a manipulation results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.2 is able to mitigate this issue. The patch is named a96bd674e0238276dd1387d31d52e55229d0771e. The affected component should be upgraded.
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
CVE-2026-19206 is a heap-based buffer overflow vulnerability in the SVReceiver_stopThreadless function within the src/sampled_values/sv_subscriber.c file of the ASDU Element Handler component in MZ Automation libiec61850. The flaw affects versions 1.6.0 and 1.6.1. Exploitation requires local access and can cause memory corruption due to improper handling of buffer boundaries. A public exploit is available. The issue is resolved by upgrading to version 1.6.2, which includes a patch identified by commit a96bd674e0238276dd1387d31d52e55229d0771e.
Potential Impact
Successful exploitation of this vulnerability can lead to heap-based buffer overflow, potentially causing application crashes or arbitrary code execution. However, exploitation requires local access, limiting remote attack vectors. The CVSS 4.8 (medium) score reflects the moderate impact and attack complexity.
Mitigation Recommendations
Upgrade affected installations of MZ Automation libiec61850 from versions 1.6.0 or 1.6.1 to version 1.6.2, which contains the official patch addressing this vulnerability. No other mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-07T08:08:58.628Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a75eebabf8831d539750bce
Added to database: 08/07/2026, 14:42:02 UTC
Last enriched: 08/07/2026, 15:02:42 UTC
Last updated: 08/07/2026, 19:59:43 UTC
Views: 9
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