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CVE-2026-54998

8.8 high exploit SSVC exploitation: none Analyzed
NVD · CVE.org

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

Fix

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.8 · microsoftNVD modified 2026-10-25 21:10

Affected (CPE criteria) 1

  • cpe:2.3:a:microsoft:exchange_online:-:*:*:*:*:*:*:*

References 1