CVE-2026-71331: Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability

highCVSS 8.1CVE-2026-71331

Integer overflow or wraparound in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoft product: Device Health Attestation (DHA) / Azure Attestation Remote code execution

What: Integer overflow in Device Health Attestation Service and Azure Attestation allows remote code execution.
Who is affected: Systems or cloud services using Azure Device Health Attestation or attestation features.
Urgency: High; CVSS 8.1 with network attack vector and no known exploitation; attestation services are sensitive trust boundaries.
Action: Apply security updates from Microsoft for attestation services.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71331

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-713310.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-71331	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.