CVE-2026-54998
Microsoft Exchange Online Elevation of Privilege Vulnerability
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
| Vendor | microsoft |
| Product | microsoft exchange online |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jul 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft Exchange Online
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