CVE-2026-21520 HIGH

CVE-2026-21520: Copilot Studio Information Disclosure Vulnerability

Vendor Microsoft
Product Microsoft Copilot Studio
Weakness CWE-77
Published January 22, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector

Key dates

02Disclosure timeline

January 22, 2026 CVE published
April 1, 2026 Record updated