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CVE-2026-21531

CRITICAL

9.8

CVSS 3.1

Metadata

CVE ID: CVE-2026-21531
State: PUBLISHED
Assigner: microsoft
Reserved: 2025-12-30 18:10 UTC
Published: 2026-02-10 17:51 UTC
Last updated: 2026-05-11 21:25 UTC
Primary CWE: CWE-502
CWE-502: Deserialization of Untrusted Data
Vendor / Product: Microsoft / Azure AI Language Authoring
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Microsoft	Azure AI Language Authoring	—	1.0.0 < 1.0.0b4

Weakness (CWE)

CWE	Source	Description
CWE-502	cna	CWE-502: Deserialization of Untrusted Data

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References (1)

Azure SDK for Python Remote Code Execution Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531

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