CVE-2026-41106

Received Received - Intake

Open Redirect Vulnerability in M365 Copilot

Publication date: 2026-07-02

Last updated on: 2026-07-02

Assigner: Microsoft Corporation

Description

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-02

Last Modified

2026-07-02

Generated

2026-07-03

AI Q&A

2026-07-03

EPSS Evaluated

N/A

NVD

CVE-2026-41106

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	m365_copilot	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-601	The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

Attack-Flow Graph

Executive Summary

This vulnerability is an 'open redirect' issue in Microsoft 365 Copilot. It allows an attacker to redirect users to untrusted websites by exploiting URL redirection mechanisms.

Through this vulnerability, an unauthorized attacker can elevate their privileges over a network.

Impact Analysis

The vulnerability can lead to serious impacts including privilege escalation over a network, which means an attacker could gain higher access rights than intended.

Because the vulnerability involves redirecting users to untrusted sites, it could also facilitate phishing attacks or other malicious activities.

The CVSS base score of 9.3 indicates a high severity, emphasizing the critical nature of this vulnerability.

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