Command Injection Vulnerability in M365 Copilot by Microsoft
CVE-2026-42893

7.4HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Outlook For iOS
Vendor
CVE Published:
12 May 2026

What is CVE-2026-42893?

An improper neutralization of special elements used in command execution within M365 Copilot enables attackers to execute unauthorized commands over a network, leading to potential tampering and data exposure.

Affected Version(s)

Microsoft Outlook for iOS 1.0.0 < 5.2617.1

References

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

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.