CVE-2026-48579
Critical
Description
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Microsoft Exchange Online
PublishedJun 4, 2026
First seenJun 4, 2026
Weakness typeCWE-285CWE-285
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft exchange_online | No range specified | — |
Check your version
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