Vulnerability-Lookup

CVE-2026-81581 (GCVE-0-2026-81581)

Vulnerability from cvelistv5 – Published: 2026-08-27 07:46 – Updated: 2026-08-27 15:00

Title

User input in WibuKey is used (without proper sanitization) to compute the address of a pointer, which can be exploited to let the user point to any storage, to which Windows responds with a denial of service.

Summary

Improper validation of memory boundaries in WibuKey64.sys of WibuKey up to 6.70 for Windows can be exploited by an attacker by setting the pointers outside the scope of the program. This usually results in a denial of service, yet we cannot rule out the possibility of exploits that can cause Remote Code Execution and Privilege Escalation (since the driver runs with system privileges).

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 14:59 UTC

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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	wibukey	Affected: 0 , < 6.71 (custom) cpe:2.3:a:wibu-systems-ag:wibukey::::::::

Date Public

2025-11-12 09:00

Credits

KEUM SUNG from Team_F1_Driver

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-81581

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

Severity

8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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-100057.pdf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.wibu.com/products/wibukey.html",
          "defaultStatus": "unaffected",
          "product": "wibukey",
          "vendor": "wibu-systems-ag",
          "versions": [
            {
              "lessThan": "6.71",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "2fc02b1f-71e7-4514-a878-169626f68903"
    }
  ],
  "cveTags": [],
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    {
      "lang": "en",
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    }
  ],
  "id": "CVE-2026-81581",
  "lastModified": "2026-08-27T17:20:55.490",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "2fc02b1f-71e7-4514-a878-169626f68903",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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            },
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            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-27T14:59:33.139643Z",
          "version": "2.0.3"
        }
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    ]
  },
  "published": "2026-08-27T10:16:40.617",
  "references": [
    {
      "source": "2fc02b1f-71e7-4514-a878-169626f68903",
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    }
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      "type": "Secondary"
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  ]
}

GHSA-M4JV-48JV-489G

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

Details

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-81581"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T10:16:40Z",
    "severity": "HIGH"
  },
  "details": "Improper validation of memory boundaries in WibuKey64.sys of WibuKey up to 6.70 for Windows can be exploited by an attacker by setting the pointers outside the scope of the program. This usually results in a denial of service, yet we cannot rule out the possibility of exploits that can cause Remote Code Execution and Privilege Escalation (since the driver runs with system privileges).",
  "id": "GHSA-m4jv-48jv-489g",
  "modified": "2026-08-27T12:30:26Z",
  "published": "2026-08-27T12:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81581"
    },
    {
      "type": "WEB",
      "url": "https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-100057.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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-2026-81581 (GCVE-0-2026-81581)

FKIE_CVE-2026-81581

GHSA-M4JV-48JV-489G

Tags

Sightings

Nomenclature