What is CVE-2026-48582?

CVE-2026-48582 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft Exchange Online Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-48582 cover?

CVE-2026-48582 covers the following CVE IDs: CVE-2026-48582. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-48582?

CVE-2026-48582 has a CVSS v3 base score of 9.6, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-48582?

CVE-2026-48582 affects 1 product, including: Microsoft Exchange Online.

CVE-2026-48582CriticalCVSS 9.6

Microsoft Exchange Online Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 19, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-48582 →

📋 Description

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

🎯 Affected products1

Microsoft Exchange Online

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48582