CVE-2026-61893— MZ Automation lib60870 Out-of-bounds Read
Quick assessment
Affected
MZ Automation lib60870
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 lib60870是德国Mz Automation公司的一款实现IEC 60870协议的通信库。 Mz Automation lib60870 2.4.0版本存在缓冲区错误漏洞，该漏洞源于构造的IEC 60870-5-104 I-frame中TypeID 104（C_TS_NA_1）对象计数膨胀，导致TestCommand_getFromBuffer读取堆分配消息缓冲区末尾之后的一个字节，造成越界读取。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MZ Automation | lib60870 | 2.4.0 |
affected |
2.4.1 |
unaffected |
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I. Basic Information for CVE-2026-61893
Vulnerability Information
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Vulnerability Title
MZ Automation lib60870 Out-of-bounds Read
Source: CVE Program / CVE List V5
Vulnerability Description
A crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) and an
inflated object count causes TestCommand_getFromBuffer to read one byte
past the end of the heap-allocated message buffer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Mz Automation lib60870 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mz Automation lib60870是德国Mz Automation公司的一款实现IEC 60870协议的通信库。 Mz Automation lib60870 2.4.0版本存在缓冲区错误漏洞，该漏洞源于构造的IEC 60870-5-104 I-frame中TypeID 104（C_TS_NA_1）对象计数膨胀，导致TestCommand_getFromBuffer读取堆分配消息缓冲区末尾之后的一个字节，造成越界读取。
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 | lib60870 | 2.4.0 | - |
|
II. Public POCs for CVE-2026-61893
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-61893 (3)
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V. Comments for CVE-2026-61893
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