CVE catalog
CVE-2026-54998
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.78% · Oct 25, 2026
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | exchange_online | Not reported | Not reported | unknown |
| Cpe | exchange_online | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: