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Description

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

PUBLISHED Reserved 2025-12-30 | Published 2026-01-22 | Updated 2026-02-22 | Assigner microsoft




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C/CR:H/IR:L/AR:L

Problem types

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

Product status

-
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21520 (Copilot Studio Information Disclosure Vulnerability) vendor-advisory patch

cve.org (CVE-2026-21520)

nvd.nist.gov (CVE-2026-21520)

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