Remote Code Execution Vulnerability in Azure SDK by Microsoft
CVE-2026-21531

9.8CRITICAL

Key Information:

Vendor

Microsoft
Status
Azure Ai Language Authoring
Vendor
CVE Published:
10 February 2026

What is CVE-2026-21531?

A vulnerability in the Azure SDK facilitates deserialization of untrusted data, enabling unauthorized attackers to execute arbitrary code over a network. This critical flaw in the Azure SDK poses significant risks to applications utilizing this framework, highlighting the importance of robust validation and security measures to prevent potential exploitation.

Affected Version(s)

Azure AI Language Authoring 1.0.0 < 1.0.0b4

References

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

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.