CVE-2026-45497: Microsoft M365 Copilot Remote Code Execution Vulnerability

Published Jun 4, 2026
·
Updated

Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an authorized attacker to execute code over a network.

Other sources

Microsoft M365 Copilot Remote Code Execution Vulnerability

Microsoft

Affected Software

3 affected components
Microsoft Microsoft 365 Copilot
Microsoft 365 Copilot
Microsoft Copilot

Event History

Jun 4, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·10:00 PM
Data Sourced
via MITRE·10:00 PM
DescriptionSeverity
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-45497?

CVE-2026-45497 has a high severity score of 8.8.

2

What type of vulnerability is CVE-2026-45497?

CVE-2026-45497 is classified as a Command Injection vulnerability.

3

How can I mitigate CVE-2026-45497?

Mitigation for CVE-2026-45497 includes updating Microsoft 365 Copilot to the latest version provided by Microsoft.

4

Who is affected by CVE-2026-45497?

CVE-2026-45497 affects users of Microsoft 365 Copilot who have authorized access.

5

What can an attacker do with CVE-2026-45497?

An attacker can execute arbitrary code over a network due to the improper neutralization of commands in CVE-2026-45497.

Contact

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