CVE-2026-26133

Published: Mar 16, 2026Modified: Jun 17, 2026

7.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Exploitability: 2.8 / Impact: 4.2

Source: secure@microsoft.com (Secondary)

Description

AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Affected (20)

Products: Microsoft: 365 Copilot, Edge, Excel, Loop, Onenote, Outlook, Power Bi, Powerpoint, Teams, Word

10 products

Configuration A

20 vulnerable

Vulnerable Software	Affected Versions
Microsoft 365 Copilot	version < 16.0.19815.10000
Microsoft 365 Copilot	version < 2.107.2
Microsoft Edge	version < 145.3800.99
Microsoft Edge	version < 145.3800.99
Microsoft Excel	version < 16.0.19822.20038
Microsoft Excel	version < 2.106.2
Microsoft Loop	version < 2.106
Microsoft Onenote	version < 16.0.19725.20142
Microsoft Onenote	All versions
Microsoft Outlook	version < 5.2605.0
Microsoft Outlook	version < 5.2605.0
Microsoft Outlook	All versions
Microsoft Power Bi	version < 2.2.260210.21290750
Microsoft Power Bi	All versions
Microsoft Powerpoint	version < 16.0.19822.20038
Microsoft Powerpoint	version < 2.106.2
Microsoft Teams	version < 1.0.0.2026043102
Microsoft Teams	version < 8.3.1
Microsoft Word	version < 16.0.19822.20038
Microsoft Word	version < 2.106.2

Related CWEs

Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.