CVE-2026-56758 (GCVE-0-2026-56758)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:29 – Updated: 2026-07-30 22:29
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The ACSE layer contains a flaw in the processing of AARQ PDUs during MMS
connection establishment. When parsing certain fields within the
calling AP title, an attacker controlled length value of zero or one may
cause the parser to read past the end of a heap buffer.
Severity
6.5 (Medium)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
Unaffected: 1.6.2 |
Credits
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"vendor": "MZ Automation GmbH",
"versions": [
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},
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"version": "1.6.2"
}
]
}
],
"credits": [
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"type": "finder",
"value": "Arun Babu of Central Power Research Institute reported this vulnerability to CISA."
}
],
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}
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}
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"metrics": [
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"baseScore": 6.5,
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"integrityImpact": "NONE",
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
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"baseScore": 6.9,
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"valueDensity": "NOT_DEFINED",
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"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
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"value": "GENERAL"
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]
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],
"problemTypes": [
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],
"providerMetadata": {
"dateUpdated": "2026-07-30T22:29:20.516Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json"
}
],
"solutions": [
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"lang": "en",
"supportingMedia": [
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"base64": false,
"type": "text/html",
"value": "MZ Automation GmbH recommends that users update to version 1.6.2."
}
],
"value": "MZ Automation GmbH recommends that users update to version 1.6.2."
}
],
"source": {
"advisory": "ICSA-26-211-10",
"discovery": "EXTERNAL"
},
"title": "MZ Automation libiec61850 Out-of-bounds Read",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
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"cveId": "CVE-2026-56758",
"datePublished": "2026-07-30T22:29:20.516Z",
"dateReserved": "2026-07-27T19:32:49.404Z",
"dateUpdated": "2026-07-30T22:29:20.516Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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