8.8

CVE-2026-54998

Microsoft Exchange Online Elevation of Privilege Vulnerability

Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Exchange Online Version-
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.63% 0.458
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
secure@microsoft.com 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54998
Vendor Advisory