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Microsoft Security Response CenterCVE-2026-65801

Microsoft Exchange Online Elevation of Privilege Vulnerability

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

Read the vendor bulletin Get alerts for Microsoft Exchange Online
10.0CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Microsoft Exchange Online
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-65801View CVSS, KEV, EPSS, and threat context
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