CVE-2026-6726ImportantSpoofingLocal
MITRE: CVE-2026-6726 TPM 2.0 Improper Object Slot Reuse
Assessment
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.
- Severity
- Important
- CVSS base score
- 7.9CVSS:3.1/
AV:L/ AC:L/ PR:H/ UI:N/ S:C/ C:H/ I:H/ A:N/ E:U/ RL:O/ RC:C - Impact
- Spoofing
- EPSS, next 30 days
- Not scored yet
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Windows TPM
- Weakness
- CWE-908: Use of Uninitialized Resource
- Issued by
- MITRE
- Published
- 11 Aug 2026 · August 2026
- Last revised
- 11 Aug 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
- Attack vector
- LocalAV:L
- Attack complexity
- LowAC:L
- Privileges required
- HighPR:H
- User interaction
- NoneUI:N
- Scope
- ChangedS:C
- Confidentiality
- HighC:H
- Integrity
- HighI:H
- Availability
- NoneA:N
Updates that fix it
14 KBs| KB | Type | Restart | Applies to | Known issues | Other CVEs |
|---|---|---|---|---|---|
| KB5120228 | Security Hotpatch Update | Required | Windows Server 2025, Windows Server 2025 (Server Core installation) | None listed | All CVEs in KB5120228 |
| KB5120229 | Security Hotpatch Update | Required | Windows Server 2022, Windows Server 2022 (Server Core installation) | None listed | All CVEs in KB5120229 |
| KB5120233 | Security Update | Required | Windows Server 2025, Windows Server 2025 (Server Core installation) | None listed | All CVEs in KB5120233 |
| KB5120238 | Security Update | Required | Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 1 more | None listed | All CVEs in KB5120238 |
| KB5120240 | Security Update | Required | Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems | None listed | All CVEs in KB5120240 |
| KB5120242 | Security Update | Required | Windows Server 2022, Windows Server 2022 (Server Core installation) | None listed | All CVEs in KB5120242 |
| KB5120249 | Security Update | Required | Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 more | None listed | All CVEs in KB5120249 |
| KB5120418 | Security Update | Required | Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems | None listed | All CVEs in KB5120418 |
| KB5120994 | Security Hotpatch Update | Required | Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more | None listed | All CVEs in KB5120994 |
| KB5121000 | Security Update | Required | Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems | ResolvedMicrosoft Teams and Outlook might fail to launch on ARM-based devices | All CVEs in KB5121000 |
| KB5121003 | Security Update | Required | Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more | ResolvedMicrosoft Teams and Outlook might fail to launch on ARM-based devices | All CVEs in KB5121003 |
| KB5123273 | Security Update | Required | Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more | None listed | All CVEs in KB5123273 |
| KB5123303 | Security Update | Required | Windows Server 2022, Windows Server 2022 (Server Core installation) | None listed | All CVEs in KB5123303 |
| KB5123607 | Security Hotpatch Update | Required | Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more | None listed | All CVEs in KB5123607 |
30 affected products
- Azure Confidential Compute VM SKU DCasv5/DCadsv5
- Azure Confidential Compute VM SKU DCasv6/DCadsv6
- Azure Confidential Compute VM SKU ECasv5/ECadsv5
- Azure Confidential Compute VM SKU ECasv6/ECadsv6
- DCesv6-series Azure VM
- Ecesv6-series Azure VM
- Windows 10 Version 1607 for 32-bit Systems
- Windows 10 Version 1607 for x64-based Systems
- Windows 10 Version 1809 for 32-bit Systems
- Windows 10 Version 1809 for x64-based Systems
- Windows 10 Version 21H2 for 32-bit Systems
- Windows 10 Version 21H2 for ARM64-based Systems
- Windows 10 Version 21H2 for x64-based Systems
- Windows 10 Version 22H2 for 32-bit Systems
- Windows 10 Version 22H2 for ARM64-based Systems
- Windows 10 Version 22H2 for x64-based Systems
- Windows 11 Version 23H2 for ARM64-based Systems
- Windows 11 Version 23H2 for x64-based Systems
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows 11 Version 25H2 for ARM64-based Systems
- Windows 11 Version 25H2 for x64-based Systems
- Windows 11 Version 26H1 for ARM64-based Systems
- Windows 11 version 26H1 for x64-based Systems
- Windows Server 2019
- Windows Server 2019 (Server Core installation)
- Windows Server 2022
- Windows Server 2022 (Server Core installation)
- Windows Server 2025
- Windows Server 2025 (Server Core installation)
What changed
First observed 14 Oct 2026- 14 Oct 2026 Source coverage: msrc-cvrfIncomplete → Current
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