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CVE-2026-19206— MZ Automation libiec61850 ASDU Element sv_subscriber.c SVReceiver_stopThreadless heap-based overflow

Quick assessment

Affected
MZ Automation libiec61850
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mz Automation libIEC61850是德国Mz Automation公司的一款用于电力系统通信的协议实现库。 Mz Automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于ASDU Element Handler组件中SVReceiver_stopThreadless函数对src/sampled_values/sv_subscriber.c文件操作不当，导致堆缓冲区溢出。

CVSS 5.3 · Medium EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 3

VendorProduct Version RangeStatus
MZ Automation libiec61850 1.6.0 affected
1.6.1 affected
1.6.2 unaffected
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I. Basic Information for CVE-2026-19206

Vulnerability Information
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Vulnerability Title
MZ Automation libiec61850 ASDU Element sv_subscriber.c SVReceiver_stopThreadless heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Mz Automation libIEC61850 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mz Automation libIEC61850是德国Mz Automation公司的一款用于电力系统通信的协议实现库。 Mz Automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于ASDU Element Handler组件中SVReceiver_stopThreadless函数对src/sampled_values/sv_subscriber.c文件操作不当，导致堆缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MZ Automation libiec61850 1.6.0 cpe:2.3:a:mz_automation:libiec61850:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19206

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III. Intelligence Information for CVE-2026-19206

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Patches & Fixes for CVE-2026-19206 (1)

Vendor Advisories for CVE-2026-19206 (2)

Proof of Concept for CVE-2026-19206 (1)

Vendor Pages for CVE-2026-19206 (1)

Other References for CVE-2026-19206 (2)

IV. Related Vulnerabilities

Same product: libiec61850
Same vendor: MZ Automation
Same weakness: CWE-122

V. Comments for CVE-2026-19206

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