CVE-2026-48582

Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

Score

CVSS 3.1 9.6 Critical

Status

Analyzed - secure@microsoft.com

Published

2026-06-19

Last modified

2026-10-25

Weaknesses

CWE-862

Affected products

• Exchange Online (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48582