Vulnerability-Lookup

CVE-2026-81576 (GCVE-0-2026-81576)

Vulnerability from cvelistv5 – Published: 2026-08-27 07:14 – Updated: 2026-08-27 13:13

Title

Improper Authentication of Session Handles

Summary

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to another handle.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 13:10 UTC

CWE

CWE-639 - Authorization bypass through User-Controlled key

Assigner

wibu

References

1 reference

URL	Tags
https://cdn.wibu.com/fileadmin/wibu_downloads/sec…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
wibu-systems-ag	codemeter-runtime	Affected: 9.00 , < 9.10 (custom) Affected: 8.00 , < 8.41a (custom) Affected: 7.00 Affected: 6.00 cpe:2.3:a:wibu-systems-ag:codemeter-runtime:::::::: cpe:2.3:a:wibu-systems-ag:codemeter-runtime:::::::: cpe:2.3:a:wibu-systems-ag:codemeter-runtime:7.00:::::::* cpe:2.3:a:wibu-systems-ag:codemeter-runtime:6.00:::::::*

Date Public

2026-08-25 13:00

Credits

Andrew Teylu of Vector Informatik GmbH

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
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            "other": {
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                "id": "CVE-2026-81576",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-27T13:10:38.008516Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-08-27T13:13:33.594Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
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          "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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      "title": "Improper Authentication of Session Handles",
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    "datePublished": "2026-08-27T07:14:11.299Z",
    "dateReserved": "2026-08-27T07:01:24.780Z",
    "dateUpdated": "2026-08-27T13:13:33.594Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "percentile": "0.2502"
    },
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  }
}

FKIE_CVE-2026-81576

Vulnerability from fkie_nvd - Published: 2026-08-27 10:16 - Updated: 2026-08-27 17:20

Severity

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

Summary

References

	URL	Tags
	2fc02b1f-71e7-4514-a878-169626f68903	https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.wibu.com/products/codemeter/runtime.html",
          "defaultStatus": "unaffected",
          "product": "codemeter-runtime",
          "vendor": "wibu-systems-ag",
          "versions": [
            {
              "lessThan": "9.10",
              "status": "affected",
              "version": "9.00",
              "versionType": "custom"
            },
            {
              "lessThan": "8.41a",
              "status": "affected",
              "version": "8.00",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "7.00"
            },
            {
              "status": "affected",
              "version": "6.00"
            }
          ]
        }
      ],
      "source": "2fc02b1f-71e7-4514-a878-169626f68903"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session\u0027s handle number, and read\nlicense information belonging to another handle."
    }
  ],
  "id": "CVE-2026-81576",
  "lastModified": "2026-08-27T17:20:55.230",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0,
        "source": "2fc02b1f-71e7-4514-a878-169626f68903",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "role": "CISA Coordinator",
          "timestamp": "2026-08-27T13:10:38.008516Z",
          "version": "2.0.3"
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    {
      "source": "2fc02b1f-71e7-4514-a878-169626f68903",
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      "type": "Secondary"
    }
  ]
}

GHSA-GJ9J-5PFX-GC7P

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

Details

Severity

7.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-81576"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T10:16:40Z",
    "severity": "HIGH"
  },
  "details": "If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session\u0027s handle number, and read\nlicense information belonging to another handle.",
  "id": "GHSA-gj9j-5pfx-gc7p",
  "modified": "2026-08-27T12:30:26Z",
  "published": "2026-08-27T12:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81576"
    },
    {
      "type": "WEB",
      "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "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-2026-81576 (GCVE-0-2026-81576)

FKIE_CVE-2026-81576

GHSA-GJ9J-5PFX-GC7P

Tags

Sightings

Nomenclature