VDB

CVE-2026-54998

CVE-2026-54998 PUBLISHED CVSS 8.8 HIGH

Reported by microsoft · Published July 2, 2026

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

Risk Scores

CVSS 3.1
8.8
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

Affected Products

VendorProductVersions
MicrosoftMicrosoft Exchange Online-
MicrosoftMicrosoft Exchange Online-, -, -
microsoftexchange_online-, -, -

Timeline

  • Jul 2, 2026 CVE Published
  • Jul 3, 2026 Security Advisory
  • Jul 4, 2026 EPSS Score
  • Jul 4, 2026 Coalition ESS Score
  • Jul 15, 2026 Security Advisory

References

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