CVE-2026-19206: Heap-based Buffer Overflow in MZ Automation libiec61850
A heap-based buffer overflow vulnerability exists in MZ Automation libiec61850 versions 1.6.0 and 1.6.1 in the SVReceiver_stopThreadless function of the ASDU Element Handler component. The flaw can be triggered by a local attacker manipulating the affected function. Exploit code has been publicly released. Upgrading to version 1.6.2 mitigates the issue.
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. This vulnerability affects versions 1.6.0 and 1.6.1 and requires local attacker privileges to exploit. Public exploit code is available. The issue is resolved by upgrading to version 1.6.2, which includes a patch identified by commit a96bd674e0238276dd1387d31d52e55229d0771e.
Potential Impact
The vulnerability allows a local attacker to cause a heap-based buffer overflow, which may lead to memory corruption and potentially impact the stability or security of the affected system. The CVSS 4.0 base score is 4.8 (medium severity), reflecting local attack vector with low complexity and no user interaction required.
Mitigation Recommendations
Upgrade MZ Automation libiec61850 to version 1.6.2, which contains the official patch for this vulnerability. This upgrade mitigates the heap-based buffer overflow in the SVReceiver_stopThreadless function. No other mitigation steps are indicated.
CVE-2026-19206: Heap-based Buffer Overflow in MZ Automation libiec61850
Description
A heap-based buffer overflow vulnerability exists in MZ Automation libiec61850 versions 1.6.0 and 1.6.1 in the SVReceiver_stopThreadless function of the ASDU Element Handler component. The flaw can be triggered by a local attacker manipulating the affected function. Exploit code has been publicly released. Upgrading to version 1.6.2 mitigates the issue.
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-2026-19206 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. This vulnerability affects versions 1.6.0 and 1.6.1 and requires local attacker privileges to exploit. Public exploit code is available. The issue is resolved by upgrading to version 1.6.2, which includes a patch identified by commit a96bd674e0238276dd1387d31d52e55229d0771e.
Potential Impact
The vulnerability allows a local attacker to cause a heap-based buffer overflow, which may lead to memory corruption and potentially impact the stability or security of the affected system. The CVSS 4.0 base score is 4.8 (medium severity), reflecting local attack vector with low complexity and no user interaction required.
Mitigation Recommendations
Upgrade MZ Automation libiec61850 to version 1.6.2, which contains the official patch for this vulnerability. This upgrade mitigates the heap-based buffer overflow in the SVReceiver_stopThreadless function. No other mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-07T08:08:58.628Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a75eebabf8831d539750bce
Added to database: 08/07/2026, 14:42:02 UTC
Last enriched: 08/14/2026, 16:18:24 UTC
Last updated: 09/22/2026, 13:47:43 UTC
Views: 61
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