CVE-2026-55946: Microsoft Copilot Information Disclosure Vulnerability

Published Sep 17, 2026
·
Updated

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

Other sources

Microsoft Copilot Information Disclosure Vulnerability

Microsoft

Affected Software

2 affected components
Microsoft Copilot
Microsoft Copilot

Event History

Sep 17, 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·10:55 PM
Data Sourced
via MITRE·10:55 PM
DescriptionSeverity

Frequently Asked Questions

1

Does exploitation require an authenticated account or user interaction?

The CVSS vector indicates no privileges are required, but user interaction is required. Exploitation also has high attack complexity.

2

What is the expected impact if exploitation succeeds?

The reported impact is high confidentiality impact, meaning information may be disclosed. No integrity or availability impact is indicated.

Contact

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