CVE-2026-6726

Credential forgery via stale object-slot reuse

Published Aug 11, 2026 · Updated Aug 11, 2026

Information leakage in Trusted Computing Group TPM 2.0 reference code through v184 allows local users to forge TPM key credentials. Stale key or data object state, including the object Name, remains after a slot is flushed and is reused as a hash context without a type check by TPM2_Certify. Elevated access to the local TPM command interface is required; successful abuse yields CA-issued credentials for falsified keys and fraudulent device attestations.

CVSS severity7.9
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information leakage in Trusted Computing Group TPM 2.0 reference code through v184 allows local users to forge TPM key credentials. Stale key or data object state, including the object Name, remains after a slot is flushed and is reused as a hash context without a type check by TPM2_Certify. Elevated access to the local TPM command interface is required; successful abuse yields CA-issued credentials for falsified keys and fraudulent device attestations.

The record

CVE
CVE-2026-6726
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Trusted Computing Group
Product
Trusted Platform Module 2.0 Library Specification
Classifications
CWE-226, CWE-704, T1649
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=v184

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Trusted Computing Group · Trusted Platform Module 2.0 Library Specificationversion=0 <=v184

Published CVSS scores

8.5Trusted Computing GroupCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
7.9Trusted Computing GroupCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-226Sensitive Information in Resource Not Removed Before Reuse
CWE-704Incorrect Type Conversion or Cast
T1649Steal or Forge Authentication Certificates

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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