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CVE-2026-48579

9.1 CRITICAL

Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network

Published: 2026-06-04 · Last updated: 2026-06-05

Severity and scoring

CVSS
9.1 CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
CWE-285

Affected products

VendorProduct
microsoftexchange_online

Description

Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.

Source: NVD

References

Related CVEs

Same vendor

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  • CVE-2026-47294 Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network (8.0 HIGH)

Same CWE

  • CVE-2026-47298 Improper authorization in Microsoft Office SharePoint allows an authorized attacker to execute code over a network (8.0 HIGH)
  • CVE-2026-45503 Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network (8.1 HIGH)
  • CVE-2026-45490 Improper authorization in .NET allows an authorized attacker to elevate privileges locally (7.8 HIGH)
  • CVE-2026-42902 Improper authorization in Microsoft PowerToys allows an authorized attacker to elevate privileges locally (7.8 HIGH)
  • CVE-2026-11619 A vulnerability was identified in Dolibarr ERP CRM up to 23.0.2 (6.3 MEDIUM)