CVE-2026-26133
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AI Command Injection in M365 Copilot Enables Remote Data Disclosure
Publication date: 2026-03-16
Last updated on: 2026-04-09
Assigner: Microsoft Corporation
Description
Description
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | outlook | * |
| microsoft | 365_copilot | to 16.0.19815.10000 (exc) |
| microsoft | edge | to 145.3800.99 (exc) |
| microsoft | excel | to 16.0.19822.20038 (exc) |
| microsoft | onenote | to 16.0.19725.20142 (exc) |
| microsoft | powerpoint | to 16.0.19822.20038 (exc) |
| microsoft | teams | to 1.0.0.2026043102 (exc) |
| microsoft | word | to 16.0.19822.20038 (exc) |
| microsoft | 365_copilot | to 2.107.2 (exc) |
| microsoft | edge | to 145.3800.99 (exc) |
| microsoft | excel | to 2.106.2 (exc) |
| microsoft | loop | to 2.106 (exc) |
| microsoft | outlook | to 5.2605.0 (exc) |
| microsoft | outlook | to 5.2605.0 (exc) |
| microsoft | onenote | * |
| microsoft | power_bi | to 2.2.260210.21290750 (exc) |
| microsoft | powerpoint | to 2.106.2 (exc) |
| microsoft | teams | to 8.3.1 (exc) |
| microsoft | word | to 2.106.2 (exc) |
| microsoft | power_bi | * |
Helpful Resources
Exploitability
CWE
KEV
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an AI command injection in Microsoft 365 Copilot. It allows an unauthorized attacker to execute commands that can lead to the disclosure of information over a network.
How can this vulnerability impact me? :
The impact of this vulnerability is information disclosure. An attacker exploiting this flaw can gain unauthorized access to sensitive information transmitted over the network.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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