What is CVE-2026-26137?

CVE-2026-26137 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft Exchange Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-26137 cover?

CVE-2026-26137 covers the following CVE IDs: CVE-2026-26137. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-26137?

CVE-2026-26137 affects 1 product, including: Microsoft Exchange Online.

CVE-2026-26137Critical

Microsoft Exchange Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-26137 →

📋 Description

Server-side request forgery (ssrf) in Microsoft Exchange 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-2026-26137