CVE-2026-54998
Microsoft Exchange Online Elevation of Privilege vulnerability
MSRC advisory July 2, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-54998
- Affected products
- Microsoft Exchange Online Elevation of Privilege · Microsoft Microsoft Exchange Online Elevation of Privilege · Microsoft
What happened
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
What it means for your business
Microsoft Exchange Online Elevation of Privilege vulnerability (CVE-2026-54998) was added to Microsoft’s security update guidance. Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network. If you need help checking exposure, call (864) 335-9223.
Sources
Related briefs
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