Vulnerability-Lookup

GHSA-72RQ-994P-W2HW

Vulnerability from github – Published: 2026-08-11 18:30 – Updated: 2026-08-12 21:31

Details

An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key. See also TCG VRT0010.

Severity

7.9 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-6726"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-704"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-11T16:17:34Z",
    "severity": "HIGH"
  },
  "details": "An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key.  See also TCG VRT0010.",
  "id": "GHSA-72rq-994p-w2hw",
  "modified": "2026-08-12T21:31:28Z",
  "published": "2026-08-11T18:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6726"
    },
    {
      "type": "WEB",
      "url": "https://trustedcomputinggroup.org/resource/errata-for-tpm-library-specification-2-0"
    },
    {
      "type": "WEB",
      "url": "https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf"
    },
    {
      "type": "WEB",
      "url": "https://trustedcomputinggroup.org/wp-content/uploads/VRT0010-Advisory_Final-1.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-6726 (GCVE-0-2026-6726)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:24 – Updated: 2026-08-12 19:18

Title

An information leakage vulnerability in the TCG TPM 2.0 reference code.

Summary

Severity

7.9 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 19:15 UTC

CWE

CWE-704 Incorrect Type Conversion or Cast
CWE-704 - Incorrect Type Conversion or Cast

Assigner

certcc

References

3 references

URL	Tags
https://trustedcomputinggroup.org/resource/errata…
https://trustedcomputinggroup.org/wp-content/uplo…
https://trustedcomputinggroup.org/wp-content/uplo…

Impacted products

1 product

Vendor	Product	Version
Trusted Computing Group	TPM2.0	Affected: 0 , ≤ v184 (custom)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 7.9,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "HIGH",
              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-6726",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T19:15:49.989531Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-704",
                "description": "CWE-704 Incorrect Type Conversion or Cast",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T19:18:15.598Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "TPM2.0",
          "vendor": "Trusted Computing Group",
          "versions": [
            {
              "lessThanOrEqual": "v184",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key.  See also TCG VRT0010."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-704 Incorrect Type Conversion or Cast",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-11T15:27:05.701Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://trustedcomputinggroup.org/resource/errata-for-tpm-library-specification-2-0/"
        },
        {
          "url": "https://trustedcomputinggroup.org/wp-content/uploads/VRT0010-Advisory_Final-1.pdf"
        },
        {
          "url": "https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "An information leakage vulnerability in the TCG TPM 2.0 reference code.",
      "x_generator": {
        "engine": "VINCE 3.0.43",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-6726"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-6726",
    "datePublished": "2026-08-11T15:24:44.880Z",
    "dateReserved": "2026-04-20T21:17:45.860Z",
    "dateUpdated": "2026-08-12T19:18:15.598Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-72RQ-994P-W2HW

CVE-2026-6726 (GCVE-0-2026-6726)

Tags

Sightings

Nomenclature