CVE-2026-54998 PUBLISHED

Microsoft Exchange Online Elevation of Privilege Vulnerability

Assigner: microsoft
Reserved: 16.06.2026 Published: 02.07.2026 Updated: 02.07.2026

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

Metrics

CVSS Vector: 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
CVSS Score: 8.8

Product Status

Vendor Microsoft
Product Microsoft Exchange Online
Versions
  • Version - is affected

References

Problem Types