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18 vulnerabilities by MZ Automation GmbH
CVE-2026-66720 (GCVE-0-2026-66720)
Vulnerability from nvd – Published: 2026-07-30 22:46 – Updated: 2026-07-31 15:58
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE subscriber component improperly validates the UTC timestamp
field in unauthenticated IEC 61850 GOOSE (EtherType 0x88B8) Layer-2
multicast messages. A specially crafted GOOSE frame containing an
undersized timestamp field can trigger a heap out-of-bounds read during
message processing, causing the process to crash and resulting in a
denial-of-service condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-66369 (GCVE-0-2026-66369)
Vulnerability from nvd – Published: 2026-07-30 22:45 – Updated: 2026-07-30 22:45
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE parser contains an off-by-one boundary-handling flaw that can
be triggered by a single unauthenticated Layer-2 multicast frame on the
process bus. When specific GOOSE message fields are processed, the
parser advances its internal buffer position incorrectly, resulting in a
heap out-of-bounds read. On affected platforms, this condition reliably
terminates the subscriber process and causes a denial-of-service.
Severity
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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CVE-2026-66364 (GCVE-0-2026-66364)
Vulnerability from nvd – Published: 2026-07-30 22:33 – Updated: 2026-07-31 15:55
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE payload parser contains a boundary handling flaw that can be
triggered by a single unauthenticated Layer 2 multicast frame on the
process bus. When processing specific payload fields, an attacker
controlled inner element length may exceed its enclosing length, causing
the parser to over read by one byte. This out-of-bounds read reliably
terminates the subscriber process, resulting in a denial-of-service
condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-66360 (GCVE-0-2026-66360)
Vulnerability from nvd – Published: 2026-07-30 22:25 – Updated: 2026-07-31 15:50
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The ISO Presentation layer contains a flaw in the handling of specific
parameters during normal mode negotiation. A missing length check in the
processing of the encoded presentation data allows an attacker
controlled field with a zero length value to trigger a bounded heap over
read. This condition occurs before MMS session establishment, a crafted
TCP/102 connection attempt can trigger the issue. The resulting over
read causes the process to terminate, leading to a denial of service
condition.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-66349 (GCVE-0-2026-66349)
Vulnerability from nvd – Published: 2026-07-30 22:31 – Updated: 2026-07-31 15:54
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS server connection handler contains a flaw in its processing of
BER-encoded request data. When an MMS confirmed request PDU containing
an extended BER tag is received over an established session, the decoder
may advance its internal buffer incorrectly due to a missing bounds
check. This results in a one byte heap out-of-bounds read and causes the
MMS service process to terminate, leading to a denial-of-service
condition.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
Unaffected: 1.6.2 |
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CVE-2026-65421 (GCVE-0-2026-65421)
Vulnerability from nvd – Published: 2026-07-30 22:35 – Updated: 2026-07-31 15:55
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS BER decoder contains a flaw in decoding fixed-width BER fields
(boolean/integer): an attacker-supplied length value is not validated,
causing a read past the end of a heap buffer. This leads to termination
of the MMS service process and a denial-of-service condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
Unaffected: 1.6.2 |
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CVE-2026-63550 (GCVE-0-2026-63550)
Vulnerability from nvd – Published: 2026-07-30 22:43 – Updated: 2026-07-31 15:57
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS BER decoder contains a boundary-handling flaw in the processing
of certain fields within confirmed-request messages. When a crafted
BER-encoded element is received over an established MMS session (TCP
port 102), the decoder may advance its internal read position
incorrectly, leading to a heap out-of-bounds read. This condition causes
the MMS handling process to terminate unexpectedly, resulting in a
denial-of-service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
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Credits
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CVE-2026-56758 (GCVE-0-2026-56758)
Vulnerability from nvd – Published: 2026-07-30 22:29 – Updated: 2026-07-31 15:52
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
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Unaffected: 1.6.2 |
Credits
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CVE-2022-21159 (GCVE-0-2022-21159)
Vulnerability from nvd – Published: 2022-04-15 16:00 – Updated: 2025-04-15 19:05
VLAI
EPSS
VEX
Summary
A denial of service vulnerability exists in the parseNormalModeParameters functionality of MZ Automation GmbH libiec61850 1.5.0. A specially-crafted series of network requests can lead to denial of service. An attacker can send a sequence of malformed iec61850 messages to trigger this vulnerability.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://github.com/mz-automation/libiec61850/comm… | x_refsource_CONFIRM |
| https://www.talosintelligence.com/vulnerability_r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
1.5.0
|
Date Public
2022-02-28 00:00
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CVE-2026-66720 (GCVE-0-2026-66720)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:46 – Updated: 2026-07-31 15:58
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE subscriber component improperly validates the UTC timestamp
field in unauthenticated IEC 61850 GOOSE (EtherType 0x88B8) Layer-2
multicast messages. A specially crafted GOOSE frame containing an
undersized timestamp field can trigger a heap out-of-bounds read during
message processing, causing the process to crash and resulting in a
denial-of-service condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-66369 (GCVE-0-2026-66369)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:45 – Updated: 2026-07-30 22:45
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE parser contains an off-by-one boundary-handling flaw that can
be triggered by a single unauthenticated Layer-2 multicast frame on the
process bus. When specific GOOSE message fields are processed, the
parser advances its internal buffer position incorrectly, resulting in a
heap out-of-bounds read. On affected platforms, this condition reliably
terminates the subscriber process and causes a denial-of-service.
Severity
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
Unaffected: 1.6.2 |
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CVE-2026-63550 (GCVE-0-2026-63550)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:43 – Updated: 2026-07-31 15:57
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS BER decoder contains a boundary-handling flaw in the processing
of certain fields within confirmed-request messages. When a crafted
BER-encoded element is received over an established MMS session (TCP
port 102), the decoder may advance its internal read position
incorrectly, leading to a heap out-of-bounds read. This condition causes
the MMS handling process to terminate unexpectedly, resulting in a
denial-of-service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-65421 (GCVE-0-2026-65421)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:35 – Updated: 2026-07-31 15:55
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS BER decoder contains a flaw in decoding fixed-width BER fields
(boolean/integer): an attacker-supplied length value is not validated,
causing a read past the end of a heap buffer. This leads to termination
of the MMS service process and a denial-of-service condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-66364 (GCVE-0-2026-66364)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:33 – Updated: 2026-07-31 15:55
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The GOOSE payload parser contains a boundary handling flaw that can be
triggered by a single unauthenticated Layer 2 multicast frame on the
process bus. When processing specific payload fields, an attacker
controlled inner element length may exceed its enclosing length, causing
the parser to over read by one byte. This out-of-bounds read reliably
terminates the subscriber process, resulting in a denial-of-service
condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
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Credits
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CVE-2026-66349 (GCVE-0-2026-66349)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:31 – Updated: 2026-07-31 15:54
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The MMS server connection handler contains a flaw in its processing of
BER-encoded request data. When an MMS confirmed request PDU containing
an extended BER tag is received over an established session, the decoder
may advance its internal buffer incorrectly due to a missing bounds
check. This results in a one byte heap out-of-bounds read and causes the
MMS service process to terminate, leading to a denial-of-service
condition.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
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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CVE-2026-56758 (GCVE-0-2026-56758)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:29 – Updated: 2026-07-31 15:52
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
0 , < 1.6.2
(custom)
Unaffected: 1.6.2 |
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CVE-2026-66360 (GCVE-0-2026-66360)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:25 – Updated: 2026-07-31 15:50
VLAI
EPSS
VEX
Title
MZ Automation libiec61850 Out-of-bounds Read
Summary
The ISO Presentation layer contains a flaw in the handling of specific
parameters during normal mode negotiation. A missing length check in the
processing of the encoded presentation data allows an attacker
controlled field with a zero length value to trigger a bounded heap over
read. This condition occurs before MMS session establishment, a crafted
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read causes the process to terminate, leading to a denial of service
condition.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
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(custom)
Unaffected: 1.6.2 |
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CVE-2022-21159 (GCVE-0-2022-21159)
Vulnerability from cvelistv5 – Published: 2022-04-15 16:00 – Updated: 2025-04-15 19:05
VLAI
EPSS
VEX
Summary
A denial of service vulnerability exists in the parseNormalModeParameters functionality of MZ Automation GmbH libiec61850 1.5.0. A specially-crafted series of network requests can lead to denial of service. An attacker can send a sequence of malformed iec61850 messages to trigger this vulnerability.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://github.com/mz-automation/libiec61850/comm… | x_refsource_CONFIRM |
| https://www.talosintelligence.com/vulnerability_r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MZ Automation GmbH | libiec61850 |
Affected:
1.5.0
|
Date Public
2022-02-28 00:00
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"ID": "CVE-2022-21159",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "libiec61850",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "1.5.0"
}
]
}
}
]
},
"vendor_name": "MZ Automation GmbH"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A denial of service vulnerability exists in the parseNormalModeParameters functionality of MZ Automation GmbH libiec61850 1.5.0. A specially-crafted series of network requests can lead to denial of service. An attacker can send a sequence of malformed iec61850 messages to trigger this vulnerability."
}
]
},
"impact": {
"cvss": {
"baseScore": 7.5,
"baseSeverity": "High",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1467",
"refsource": "MISC",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2022-1467"
},
{
"name": "https://github.com/mz-automation/libiec61850/commit/cfa94cbf10302bedc779703f874ee2e8387a0721",
"refsource": "CONFIRM",
"url": "https://github.com/mz-automation/libiec61850/commit/cfa94cbf10302bedc779703f874ee2e8387a0721"
},
{
"name": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1467",
"refsource": "MISC",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1467"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"assignerShortName": "talos",
"cveId": "CVE-2022-21159",
"datePublished": "2022-04-15T16:00:21.545Z",
"dateReserved": "2022-02-15T00:00:00.000Z",
"dateUpdated": "2025-04-15T19:05:23.770Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}