BaseFortify

Publication date: 2026-01-22

Last updated on: 2026-02-02

Assigner: Microsoft Corporation

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 Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-01-22

Last Modified

2026-02-02

Generated

2026-07-06

AI Q&A

2026-01-23

EPSS Evaluated

2026-07-05

NVD

CVE-2026-21520

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	copilot_studio	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-77	The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability in Copilot Studio allows an unauthenticated attacker to expose sensitive information by exploiting a network attack vector, meaning the attacker can access confidential data without needing to log in or have permissions.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information, potentially compromising privacy and security. Since the attacker does not need authentication, it increases the risk of data breaches and exposure of confidential data.

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