#VU122580 Deserialization of Untrusted Data in Azure AI Language Authoring - CVE-2026-21531

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Main Vulnerability Database Vulnerabilities #VU122580

#VU122580 Deserialization of Untrusted Data in Azure AI Language Authoring - CVE-2026-21531

Published: February 10, 2026


Vulnerability identifier: #VU122580
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-21531
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Azure AI Language Authoring
Software vendor:
Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in Azure SDK for Python. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install updates from vendor's website.

External links