CVE-2026-21520

High

Description

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

SeverityHigh

CVSS7.5

Exploit probability—

Product

Microsoft Copilot Studio

PublishedJan 22, 2026

First seenJan 22, 2026

Weakness typeCWE-77Command injection

How to fix

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21520

Affected products

Product	Affected versions	Fixed in
microsoft copilot_studio	No range specified	—

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