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CRITICAL · 9.8

CVE-2026-21531

Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.

Vulnerability Description

Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftAzure Conversation Authoring Client Library1.0.0

Related Weaknesses (CWE)

CWE-502

References

FAQ

What is CVE-2026-21531?

CVE-2026-21531 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.

How severe is CVE-2026-21531?

CVE-2026-21531 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-21531?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Azure Conversation Authoring Client Library.