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CVE-2026-49035— Stack-based Buffer Overflow in MZ Automation libIEC61850

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Mz-automation个人开发者开源的一个 IEC 61850 协议的开源库。 Mz-automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于通过特制MMS Initiate请求导致堆缓冲区溢出，可能在ASLR禁用时导致远程代码执行，在ASLR启用时导致内存损坏或拒绝服务。

CVSS 8.1 · High EPSS 0.61% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
MZ Automation libIEC61850 1.0.0≤ 1.6.1 affected
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I. Basic Information for CVE-2026-49035

Vulnerability Information
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Vulnerability Title
Stack-based Buffer Overflow in MZ Automation libIEC61850
Source: CVE Program / CVE List V5
Vulnerability Description
The affected product is vulnerable to a heap-based buffer overflow via a crafted MMS Initiate request. Remote code execution (RCE) has been demonstrated when ASLR is disabled; memory corruption or denial of service may occur in configurations where ASLR is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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Mz-automation个人开发者开源的一个 IEC 61850 协议的开源库。 Mz-automation libIEC61850 1.6.1及之前版本存在缓冲区错误漏洞，该漏洞源于通过特制MMS Initiate请求导致堆缓冲区溢出，可能在ASLR禁用时导致远程代码执行，在ASLR启用时导致内存损坏或拒绝服务。
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 1.0.0 ~ 1.6.1 -

II. Public POCs for CVE-2026-49035

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III. Intelligence Information for CVE-2026-49035

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Vendor Advisories for CVE-2026-49035 (1)

Same Patch Batch · MZ Automation · 2026-07-23 · 5 CVEs total

CVE-2026-16002 8.2 HIGH Out-of-bounds Read in MZ Automation lib60870
CVE-2026-50039 7.5 HIGH Stack-based Buffer Overflow in MZ Automation libIEC61850
CVE-2026-50032 7.5 HIGH NULL Pointer Dereference in MZ Automation libIEC61850
CVE-2026-50103 6.5 MEDIUM Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850

IV. Related Vulnerabilities

Same product: libIEC61850
Same vendor: MZ Automation
Same weakness: CWE-122

V. Comments for CVE-2026-49035

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