CVE-2026-61893: CWE-125 in MZ Automation lib60870
CVE-2026-61893 is a medium severity vulnerability in MZ Automation's lib60870 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. This triggers the function TestCommand_getFromBuffer to read one byte beyond the allocated message buffer.
AI Analysis
Technical Summary
This vulnerability (CWE-125) in lib60870 version 2.4.0 arises when processing a specifically crafted IEC 60870-5-104 I-frame (TypeID 104, C_TS_NA_1) that contains an inflated object count. The function TestCommand_getFromBuffer reads one byte past the end of the heap-allocated buffer, resulting in a heap buffer over-read. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low complexity, no privileges or user interaction required, and limited confidentiality and availability impact.
Potential Impact
An attacker can cause a heap buffer over-read by sending a maliciously crafted IEC 60870-5-104 I-frame to a system using lib60870 version 2.4.0. This may lead to limited information disclosure (confidentiality impact) and partial service disruption (availability impact). There is no indication of integrity impact or known exploits in the wild.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users should monitor the vendor's advisories for updates. Until a fix is released, consider implementing network-level protections to restrict untrusted IEC 60870-5-104 traffic to affected systems.
CVE-2026-61893: CWE-125 in MZ Automation lib60870
Description
CVE-2026-61893 is a medium severity vulnerability in MZ Automation's lib60870 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. This triggers the function TestCommand_getFromBuffer to read one byte beyond the allocated message buffer.
CVSS v3.1
Score 6.5medium
Affected software
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 arises when processing a specifically crafted IEC 60870-5-104 I-frame (TypeID 104, C_TS_NA_1) that contains an inflated object count. The function TestCommand_getFromBuffer reads one byte past the end of the heap-allocated buffer, resulting in a heap buffer over-read. The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low complexity, no privileges or user interaction required, and limited confidentiality and availability impact.
Potential Impact
An attacker can cause a heap buffer over-read by sending a maliciously crafted IEC 60870-5-104 I-frame to a system using lib60870 version 2.4.0. This may lead to limited information disclosure (confidentiality impact) and partial service disruption (availability impact). There is no indication of integrity impact or known exploits in the wild.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Users should monitor the vendor's advisories for updates. Until a fix is released, consider implementing network-level protections to restrict untrusted IEC 60870-5-104 traffic to affected systems.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- icscert
- Date Reserved
- 2026-07-16T22:10:53.022Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6bdccd9c2644c7f8d9d02d
Added to database: 07/30/2026, 23:22:53 UTC
Last enriched: 07/30/2026, 23:53:44 UTC
Last updated: 07/31/2026, 00:29:43 UTC
Views: 5
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