CVE-2026-21531

CRITICAL EPSS 81.5%
Published Feb 10, 20264mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 10, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
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

Threat Intelligence

EPSS Exploit Probability
81.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-502 Deserialization of Untrusted Data Validation

Affected Products 3

VendorProductVersionRange
microsoftazure_conversation_authoring_client_library1.0.0any
microsoftazure_conversation_authoring_client_library1.0.0any
microsoftazure_conversation_authoring_client_library1.0.0any

References 1

  • msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.