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Azure CVE-2026-21531

CRITICAL
Deserialization of Untrusted Data (CWE-502)
2026-02-10 secure@microsoft.com GHSA-436v-jg82-p533
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 22:02 vuln.today
CVE Published
Feb 10, 2026 - 18:16 nvd
CRITICAL 9.8

DescriptionCVE.org

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

AnalysisAI

Deserialization of untrusted data in Azure SDK allows unauthorized code execution over a network. EPSS 0.32%.

Technical ContextAI

CWE-502 deserialization of untrusted data in Azure SDK enabling remote code execution.

RemediationAI

Update Azure SDK to patched version.

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CVE-2026-21531 vulnerability details – vuln.today

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