FKIE_CVE-2026-81572

Vulnerability from fkie_nvd - Published: 2026-08-27 10:16 - Updated: 2026-08-27 17:20
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
2fc02b1f-71e7-4514-a878-169626f68903https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdf
2fc02b1f-71e7-4514-a878-169626f68903https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application
Impacted products
Vendor Product Version
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": "2026-08-27T17:20:54.737",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-81572",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-27T13:34:27.207956Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "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"
    }
  ]
}



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