Integer Overflow Vulnerability in Microsoft Azure Attestation Service
CVE-2026-71331

8.1HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
11 August 2026

What is CVE-2026-71331?

A critical integer overflow vulnerability exists in the Microsoft Azure Attestation Service and Device Health Attestation Service. This flaw allows unauthorized attackers to execute arbitrary code over a network, potentially compromising sensitive systems and leading to unauthorized access. Organizations using these services should take immediate action to apply necessary patches and enhance their security posture.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9115

Windows Server 2019 (Server Core installation) x64-based Systems 10.0.17763.0 < 10.0.17763.9115

Windows Server 2019 x64-based Systems 10.0.17763.0 < 10.0.17763.9115

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.