Command Injection Vulnerability in Microsoft Copilot
CVE-2026-55946

6.1MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Copilot
Vendor
CVE Published:
17 September 2026

What is CVE-2026-55946?

An improper handling of special elements in Microsoft Copilot enables unauthorized attackers to execute command injection, potentially leading to sensitive information being disclosed over a network. This vulnerability can compromise user data and undermine the security integrity of applications utilizing the Microsoft Copilot, prompting immediate attention and remediation.

Affected Version(s)

Microsoft Copilot -

References

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

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.