CVE-2026-48579
Microsoft Exchange Online Information Disclosure vulnerability
MSRC advisory June 4, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-48579
- Affected products
- Microsoft Exchange Online Information Disclosure · Microsoft Microsoft Exchange Online Information Disclosure · Microsoft
What happened
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
What it means for your business
Microsoft Exchange Online Information Disclosure vulnerability (CVE-2026-48579) was added to Microsoft’s security update guidance. Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network. If you need help checking exposure, call (864) 335-9223.
Sources
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