CVE-2026-61893: CWE-125 in MZ Automation lib60870
CVE-2026-61893 is a medium severity vulnerability in MZ Automation's lib60870 library version 2.4.0. It involves a heap buffer over-read caused by a crafted IEC 60870-5-104 I-frame with TypeID 104 and an inflated object count, leading the function TestCommand_getFromBuffer to read one byte past the allocated buffer.
AI Analysis
Technical Summary
This vulnerability (CWE-125) in lib60870 version 2.4.0 occurs when a specially crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) contains an inflated object count. This causes the TestCommand_getFromBuffer function to read one byte beyond the end of the heap-allocated message buffer, potentially leading to information disclosure or application instability. The CVSS v3.1 base score is 6.5, reflecting network attack vector, low complexity, no privileges or user interaction required, and limited confidentiality and availability impact.
Potential Impact
An attacker can send a crafted IEC 60870-5-104 message to trigger a heap buffer over-read by the vulnerable function. This may result in limited information disclosure or cause the application to crash, impacting availability. There is no indication of code execution or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users should monitor the vendor advisory for updates and consider implementing network-level protections to restrict untrusted IEC 60870-5-104 traffic until a fix is released.
CVE-2026-61893: CWE-125 in MZ Automation lib60870
Description
CVE-2026-61893 is a medium severity vulnerability in MZ Automation's lib60870 library version 2.4.0. It involves a heap buffer over-read caused by a crafted IEC 60870-5-104 I-frame with TypeID 104 and an inflated object count, leading the function TestCommand_getFromBuffer to read one byte past the allocated buffer.
CVSS v3.1
Score 6.5medium
Affected software
MZ Automation
lib60870
pkg:github/mz-automation/lib60870Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-125) in lib60870 version 2.4.0 occurs when a specially crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) contains an inflated object count. This causes the TestCommand_getFromBuffer function to read one byte beyond the end of the heap-allocated message buffer, potentially leading to information disclosure or application instability. The CVSS v3.1 base score is 6.5, reflecting network attack vector, low complexity, no privileges or user interaction required, and limited confidentiality and availability impact.
Potential Impact
An attacker can send a crafted IEC 60870-5-104 message to trigger a heap buffer over-read by the vulnerable function. This may result in limited information disclosure or cause the application to crash, impacting availability. There is no indication of code execution or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users should monitor the vendor advisory for updates and consider implementing network-level protections to restrict untrusted IEC 60870-5-104 traffic until a fix is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- icscert
- Date Reserved
- 2026-07-16T22:10:53.022Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6bdccd9c2644c7f8d9d02d
Added to database: 07/30/2026, 23:22:53 UTC
Last enriched: 08/07/2026, 14:50:44 UTC
Last updated: 09/13/2026, 22:01:35 UTC
Views: 60
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