CVE-2026-48582

CRITICAL

Microsoft Exchange Online Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

Description

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Exchange Online Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48582

Scores

CVSS v3 9.6
EPSS 0.0039
EPSS Percentile 30.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-862
Status published
Products (2)
microsoft/exchange_online
Microsoft/Microsoft Exchange Online -
Published Jun 19, 2026
Tracked Since Jun 20, 2026