CVE-2026-26137
Received Received - Intake

Server-Side Request Forgery in Microsoft 365 Copilot Business Chat Enables Privilege Escalation

Publication date: 2026-03-19

Last updated on: 2026-03-27

Assigner: Microsoft Corporation

Description
Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.

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Meta Information

Published
2026-03-19
Last Modified
2026-03-27
Generated
2026-07-06
AI Q&A
2026-03-19
EPSS Evaluated
2026-07-05
NVD
CVE-2026-26137
EUVD
EUVD-2026-13184

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft 365_copilot_chat *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

[{'type': 'paragraph', 'content': "This vulnerability is a server-side request forgery (SSRF) issue found in Microsoft 365 Copilot's Business Chat. It allows an authorized attacker to send crafted requests from the server, which can lead to elevated privileges over a network."}] [1]

Impact Analysis

The impact of this vulnerability is an elevation of privilege, meaning an attacker who is already authorized can gain higher-level access than intended. This can lead to critical consequences such as unauthorized access to sensitive data or systems within the network.

Compliance Impact

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