1. Home
  2. CVE Database
  3. CVE-2026-21520
HIGH · 7.5

CVE-2026-21520

Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector

Vulnerability Description

Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftCopilot Studio-

Related Weaknesses (CWE)

CWE-77

References

FAQ

What is CVE-2026-21520?

CVE-2026-21520 is a vulnerability with a CVSS score of 7.5 (HIGH). Exposure of Sensitive Information to an Unauthorized Actor in Copilot Studio allows a unauthenticated attacker to view sensitive information through network attack vector

How severe is CVE-2026-21520?

CVE-2026-21520 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-21520?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Copilot Studio.