CVE-2026-6726: An information leakage vulnerability in the TCG TPM 2.0 reference code.
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.
Other sources
CVE-2026-6726 is a Spoofing vulnerability in the TPM 2.0 reference implementation involving improper object-slot reuse. MITRE assigned this CVE on behalf of the Trusted Computing Group. This document incorporates updates to Microsoft Windows that address this vulnerability. Please see CVE-2026-6726 for more information.
— Microsoft
MITRE: CVE-2026-6726 TPM 2.0 Improper Object Slot Reuse
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9168Fixed in 10.0.26000.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.19045.7663Patch KB5120249 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7663Patch KB5120249 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229
Event History
Frequently Asked Questions
What is the severity of CVE-2026-6726?
The severity of CVE-2026-6726 is rated as risk 44.
How do I fix CVE-2026-6726?
To fix CVE-2026-6726, it is recommended to apply the latest patches provided by the TCG TPM 2.0 reference code maintainers.
Who is affected by CVE-2026-6726?
CVE-2026-6726 affects users and systems utilizing the TCG TPM 2.0 reference code.
What kind of attack can exploit CVE-2026-6726?
CVE-2026-6726 can be exploited by a local attacker with elevated privileges to obtain credentials from a TPM-aware CA.
What types of keys can be compromised due to CVE-2026-6726?
CVE-2026-6726 could potentially compromise keys such as Attestation Key, DevID Key, or TLS authentication key.