CVE-2025-59286 CRITICAL

CVE-2025-59286: Copilot Information Disclosure Vulnerability

Vendor Microsoft
Product Microsoft 365 Copilot's Business Chat
Weakness CWE-77
Published October 9, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to disclose information over a network.

Key dates

02Disclosure timeline

October 9, 2025 CVE published
February 26, 2026 Record updated