CVE-2026-21520

HIGH

7.5

Description

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

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/22/2026

Last Modified2/2/2026

Sourcenvd

Honeypot Sightings0

Affected Products

microsoft:copilot_studio

Weaknesses (CWE)

CWE-77

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21520(secure@microsoft.com)

IOC Correlations

No correlations recorded

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