Microsoft Exchange Online Privilege Escalation

Publication date: 2026-06-19

Last updated on: 2026-06-24

Assigner: Microsoft Corporation

Description

Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-19

Last Modified

2026-06-24

Generated

2026-07-11

AI Q&A

2026-06-20

EPSS Evaluated

2026-07-10

NVD

CVE-2026-48582

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	exchange_online	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Impact Analysis

The vulnerability can have a severe impact because it allows an attacker with some level of access to increase their privileges significantly. According to the CVSS score of 9.6, it can lead to complete compromise of confidentiality and integrity of the affected system, although it does not affect availability.

Executive Summary

This vulnerability is a missing authorization issue in Microsoft Exchange Online. It allows an attacker who is already authorized to access the system to elevate their privileges over a network.

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