CVE-2026-50039— Stack-based Buffer Overflow in MZ Automation libIEC61850
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MZ Automation | libIEC61850 | 1.0.0≤ 1.6.1 | affected |
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I. Basic Information for CVE-2026-50039
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 stack-based buffer overflow, which may allow an attacker to cause a memory corruption via a Read Request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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，该漏洞源于栈缓冲区溢出，可能允许攻击者通过读取请求导致内存损坏。
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-2026-50039
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-50039 (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-2026-49035 | 8.1 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
- CVE-2026-19259
MZ Automation libiec61850 MMS Protocol Workflow iec61850_com - CVE-2026-19206
MZ Automation libiec61850 ASDU Element sv_subscriber.c SVRec - CVE-2026-19108
MZ Automation libiec61850 URCB Revalidation reporting.c dele - CVE-2026-18583
mz-automation libiec61850 MMS Request mms_mapping.c checkDat - CVE-2026-18582
mz-automation libiec61850 Report Sending Path reporting.c Re
Same vendor: MZ Automation
- CVE-2026-19259
MZ Automation libiec61850 MMS Protocol Workflow iec61850_com - CVE-2026-19206
MZ Automation libiec61850 ASDU Element sv_subscriber.c SVRec - CVE-2026-19108
MZ Automation libiec61850 URCB Revalidation reporting.c dele - CVE-2026-61893
MZ Automation lib60870 Out-of-bounds Read - CVE-2026-63033
MZ Automation lib60870 Out-of-bounds Read
Same weakness: CWE-121
- CVE-2026-58082
Stack based buffer overflow in iconv(3) - CVE-2026-49420
Buffer overflow in libalias RTSP handler - CVE-2026-76008
Comfast CF-N1-S URI Parameter Parsing mbox-config get_para_f - CVE-2026-76004
UTT HiPER 1250GW HTTP aspApBasicConfigUrcp strcpy stack-base - CVE-2026-76003
UTT HiPER 1200GW formGroupConfig strcpy stack-based overflow
V. Comments for CVE-2026-50039
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