Vulnerability Intelligence Report
Azure SDK for Python Remote Code Execution Vulnerability
CVE-2026-21531
Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.
Deserialization
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:2.34%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-502 ↗CWE-502: Deserialization of Untrusted Data
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Azure AI Language Authoring | 1.0.0 < 1.0.0b4 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2025-12-30T18:10:54 |
| Published | 2026-02-10T17:51:31 |
| Patch Date | 2026-02-10 |
| Last Updated | 2026-08-19T16:26:02 |
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