CVE-2026-48579

Microsoft Exchange Online Information Disclosure Vulnerability

Published Jun 4, 2026 CVSS 3.1 · 9.1 Critical EPSS 1.0% KEV · Not listed
Description
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:exchange_online:-:*:*:*:*:*:*:*
Type Values Removed Values Added
Description Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
Title Microsoft Exchange Online Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft exchange Online
Weaknesses CWE-285
CPEs cpe:2.3:a:microsoft:exchange_online:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft exchange Online
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 11:25 PM
Reserved
May 21, 2026, 8:00 PM
Status
Analyzed
Published
Jun 4, 2026, 11:17 PM
Modified
Jul 23, 2026, 7:10 AM