Vulnerability-Lookup

CVE-2026-81572 (GCVE-0-2026-81572)

Vulnerability from cvelistv5 – Published: 2026-08-27 07:06 – Updated: 2026-08-27 07:06

Title

Local Privilege Escalation in CodeMeter Runtime on Windows

Summary

cmu.exe --create-io --file C: creates a predictable temporary file under C:\CM-Stick. The directory and file paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before file operations are performed. A local attacker can create a junction at the temporary file that points to an arbitrary system path. Because CodeMeter Runtime runs with System privileges, this could allow arbitrary files to be deleted with System privileges and potentially enable local privilege escalation.

Severity

7.8 (High)


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

CWE

CWE-59 - Improper link resolution before file access ('link following')

Assigner

wibu

References

2 references

URL	Tags
https://cdn.wibu.com/fileadmin/wibu_downloads/sec…	vendor-advisory
https://shelltrail.com/research/local-privilege-e…	technical-description

Impacted products

1 product

Vendor	Product	Version	CPE status
wibu-systems-ag	codemeter-runtime	Affected: 8.40 , < 8.41a (custom) Affected: 9.00 , < 9.10 (custom) cpe:2.3:a:wibu-systems-ag:codemeter-runtime:::windows:::::* cpe:2.3:a:wibu-systems-ag:codemeter-runtime:::windows:::::*

Date Public

2026-08-25 13:00

Credits

Andreas Vikerup of Shelltrail AB

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.wibu.com/products/codemeter/runtime.html",
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "codemeter-runtime",
          "vendor": "wibu-systems-ag",
          "versions": [
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              "lessThan": "8.41a",
              "status": "affected",
              "version": "8.40",
              "versionType": "custom"
            },
            {
              "lessThan": "9.10",
              "status": "affected",
              "version": "9.00",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:windows:*:*:*:*:*",
                  "versionEndExcluding": "8.41a",
                  "versionStartIncluding": "8.40",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "9.10",
                  "versionStartIncluding": "9.00",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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          "operator": "OR"
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      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "Andreas Vikerup of Shelltrail AB"
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "problemTypes": [
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              "description": "CWE-59 Improper link resolution before file access (\u0027link following\u0027)",
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            }
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      },
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          ],
          "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdf"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Local Privilege Escalation in CodeMeter Runtime on Windows",
      "x_generator": {
        "engine": "Vulnogram 1.0.0-beta"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2fc02b1f-71e7-4514-a878-169626f68903",
    "assignerShortName": "wibu",
    "cveId": "CVE-2026-81572",
    "datePublished": "2026-08-27T07:06:17.884Z",
    "dateReserved": "2026-08-27T07:01:24.780Z",
    "dateUpdated": "2026-08-27T07:06:17.884Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "date": "2026-08-27",
      "epss": "0.00166",
      "percentile": "0.06041"
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    "vulnrichment": {
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}

FKIE_CVE-2026-81572

Vulnerability from fkie_nvd - Published: 2026-08-27 10:16 - Updated: 2026-08-27 10:16

Severity

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

Summary

References

	URL	Tags
	2fc02b1f-71e7-4514-a878-169626f68903	https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdf
	2fc02b1f-71e7-4514-a878-169626f68903	https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.wibu.com/products/codemeter/runtime.html",
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "codemeter-runtime",
          "vendor": "wibu-systems-ag",
          "versions": [
            {
              "lessThan": "8.41a",
              "status": "affected",
              "version": "8.40",
              "versionType": "custom"
            },
            {
              "lessThan": "9.10",
              "status": "affected",
              "version": "9.00",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "2fc02b1f-71e7-4514-a878-169626f68903"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "cmu.exe --create-io --file C: creates a predictable temporary file under C:\\CM-Stick. The directory and\nfile paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before file\noperations are performed. A local attacker can create a junction at the temporary file that points to an arbitrary\nsystem path. Because CodeMeter Runtime runs with System privileges, this could allow arbitrary files to be deleted\nwith System privileges and potentially enable local privilege escalation."
    }
  ],
  "id": "CVE-2026-81572",
  "lastModified": "2026-08-27T10:16:39.810",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "2fc02b1f-71e7-4514-a878-169626f68903",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-27T10:16:39.810",
  "references": [
    {
      "source": "2fc02b1f-71e7-4514-a878-169626f68903",
      "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdf"
    },
    {
      "source": "2fc02b1f-71e7-4514-a878-169626f68903",
      "url": "https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application"
    }
  ],
  "sourceIdentifier": "2fc02b1f-71e7-4514-a878-169626f68903",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        }
      ],
      "source": "2fc02b1f-71e7-4514-a878-169626f68903",
      "type": "Secondary"
    }
  ]
}

GHSA-C6XR-X2JW-73RP

Vulnerability from github – Published: 2026-08-27 12:30 – Updated: 2026-08-27 12:30

Details

Severity

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-81572"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T10:16:39Z",
    "severity": "HIGH"
  },
  "details": "cmu.exe --create-io --file C: creates a predictable temporary file under C:\\CM-Stick. The directory and\nfile paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before file\noperations are performed. A local attacker can create a junction at the temporary file that points to an arbitrary\nsystem path. Because CodeMeter Runtime runs with System privileges, this could allow arbitrary files to be deleted\nwith System privileges and potentially enable local privilege escalation.",
  "id": "GHSA-c6xr-x2jw-73rp",
  "modified": "2026-08-27T12:30:26Z",
  "published": "2026-08-27T12:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81572"
    },
    {
      "type": "WEB",
      "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdf"
    },
    {
      "type": "WEB",
      "url": "https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-81572 (GCVE-0-2026-81572)

FKIE_CVE-2026-81572

GHSA-C6XR-X2JW-73RP

Tags

Sightings

Nomenclature