Command Injection Vulnerability in Microsoft M365 Copilot
CVE-2026-42827

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Copilot
Vendor
CVE Published:
22 May 2026

What is CVE-2026-42827?

A command injection vulnerability in Microsoft M365 Copilot allows attackers to improperly neutralize special elements used in commands. This flaw could enable unauthorized individuals to disclose sensitive information over a network, potentially leading to further exploits. Timely updates and security measures are advisable to mitigate this risk effectively.

Affected Version(s)

Microsoft 365 Copilot -

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.