Vulnerability-Lookup

CVE-2026-63550 (GCVE-0-2026-63550)

Vulnerability from cvelistv5 – Published: 2026-07-30 22:43 – Updated: 2026-07-31 15:57

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

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-31 15:55 UTC

CWE

CWE-125

Assigner

icscert icscert root

References

2 references

URL	Tags
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

1 product

Vendor	Product	Version	CPE status
MZ Automation GmbH	libiec61850	Affected: 0 , < 1.6.2 (custom) Unaffected: 1.6.2	guessed

Credits

Arun Babu of Central Power Research Institute reported this vulnerability to CISA.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-63550

Vulnerability from fkie_nvd - Published: 2026-07-30 23:16 - Updated: 2026-09-03 18:07

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	ics-cert@hq.dhs.gov	https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json
	ics-cert@hq.dhs.gov	https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "libiec61850",
          "vendor": "MZ Automation GmbH",
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  "lastModified": "2026-09-03T18:07:20.103",
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    },
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      "source": "ics-cert@hq.dhs.gov",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10"
    }
  ],
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}

GHSA-MGH9-X48V-5VX9

Vulnerability from github – Published: 2026-07-31 00:30 – Updated: 2026-07-31 00:30

Details

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-63550"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T23:16:52Z",
    "severity": "HIGH"
  },
  "details": "The MMS BER decoder contains a boundary-handling flaw in the processing \nof certain fields within confirmed-request messages. When a crafted \nBER-encoded element is received over an established MMS session (TCP \nport 102), the decoder may advance its internal read position \nincorrectly, leading to a heap out-of-bounds read. This condition causes\n the MMS handling process to terminate unexpectedly, resulting in a \ndenial-of-service.",
  "id": "GHSA-mgh9-x48v-5vx9",
  "modified": "2026-07-31T00:30:22Z",
  "published": "2026-07-31T00:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63550"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.json"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-10"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

ICSA-26-211-10

Vulnerability from csaf_cisa - Published: 2026-07-30 06:00 - Updated: 2026-07-30 06:00

Summary

MZ Automation GmbH libiec61850

Scope

8 vulnerabilities in this advisory, including CVE-2026-63550.

CVE-2026-63550

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Known affected: 1 product

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-63550 (GCVE-0-2026-63550)

FKIE_CVE-2026-63550

GHSA-MGH9-X48V-5VX9

ICSA-26-211-10

Tags

Sightings

Nomenclature

Related by attack behaviour