Parser crash via undersized TypeID 41 length check
Published Jul 23, 2026 · Updated Jul 23, 2026
Out-of-bounds read in MZ Automation lib60870 2.4.0 and earlier allows remote attackers to crash parsers with a crafted TypeID 41 ASDU. The IntegratedTotalsForSecurityStatistics decoder validates only five bytes before consuming a 14-byte element, so an inflated VSQ count reads beyond the message buffer. Network access to a CS101 master or CS104 client that handles this security-counter type is required; the demonstrated consequence is a process crash, not code execution.
Summary
What happened
Out-of-bounds read in MZ Automation lib60870 2.4.0 and earlier allows remote attackers to crash parsers with a crafted TypeID 41 ASDU. The IntegratedTotalsForSecurityStatistics decoder validates only five bytes before consuming a 14-byte element, so an inflated VSQ count reads beyond the message buffer. Network access to a CS101 master or CS104 client that handles this security-counter type is required; the demonstrated consequence is a process crash, not code execution.
The record
- CVE
- CVE-2026-16002
- Published
- Jul 23, 2026
- Updated
- Jul 23, 2026
- Vendor
- MZ Automation GmbH
- Product
- lib60870
- Classifications
- CWE-125, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 23, 2026CVE publishedPublication date reported by the CVE source.
- Jul 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=2.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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