CVE-2026-71331CriticalRevised 20 Aug

Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability

Assessment

Integer overflow or wraparound in Windows Device Health Attestation (DHA) allows an unauthorized attacker to execute code over a network.

Severity: Critical
CVSS base score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact: Remote Code Execution
EPSS, next 30 days: 0.7%Higher than 51.5% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability: Exploitation Less Likely
Publicly disclosed: No
Customer action: Required: apply the update
Component: Windows Device Health Attestation (DHA)
Weakness: CWE-190: Integer Overflow or Wraparound
Issued by: Microsoft
Published: 11 Aug 2026 · August 2026
Last revised: 20 Aug 2026Updated links to security updates. This is an informational change only.

5 KBs

KB	Type	Restart	Applies to	Other CVEs
KB5120228	Security Hotpatch Update	Required	Windows Server 2025, Windows Server 2025 (Server Core installation)	All CVEs in KB5120228
KB5120229	Security Hotpatch Update	Required	Windows Server 2022, Windows Server 2022 (Server Core installation)	All CVEs in KB5120229
KB5120233	Security Update	Required	Windows Server 2025, Windows Server 2025 (Server Core installation)	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	All CVEs in KB5120238
KB5120242	Security Update	Required	Windows Server 2022, Windows Server 2022 (Server Core installation)	All CVEs in KB5120242

Windows

8 affected products