CVE-2026-42824
Modified Modified - Updated After Analysis
Command Injection in M365 Copilot

Publication date: 2026-06-04

Last updated on: 2026-06-19

Assigner: Microsoft Corporation

Description
Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
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Meta Information
Published
2026-06-04
Last Modified
2026-06-19
Generated
2026-06-25
AI Q&A
2026-06-05
EPSS Evaluated
2026-06-24
NVD
CVE-2026-42824
EUVD
EUVD-2026-34334
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft copilot *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-77 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.
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Executive Summary

This vulnerability is a command injection issue in Microsoft 365 Copilot. It occurs because the software does not properly neutralize special elements used in commands, allowing an unauthorized attacker to execute commands that can disclose information over a network.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information over a network. An attacker could exploit this flaw to gain access to confidential data without proper authorization.

Compliance Impact

This vulnerability allows an unauthorized attacker to disclose information over a network due to improper neutralization of special elements used in a command ('command injection') in M365 Copilot.

Such unauthorized information disclosure could potentially impact compliance with data protection standards and regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access and disclosure.

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