CVE-2026-45503

Microsoft Exchange Server Information Disclosure Vulnerability

Published Jun 9, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
Improper authorization in Microsoft Exchange Server allows an authorized 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
Description Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network. Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Type Values Removed Values Added
First Time appeared Microsoft exchange Server
Microsoft exchange Server Subscription Edition
Weaknesses CWE-918
CPEs cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*
Vendors & Products Microsoft exchange Server
Microsoft exchange Server Subscription Edition
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Microsoft microsoft Exchange Server 2016 Cumulative Update 23
Microsoft microsoft Exchange Server 2019 Cumulative Update 14
Microsoft microsoft Exchange Server 2019 Cumulative Update 15
Microsoft microsoft Exchange Server Subscription Edition Rtm
Vendors & Products Microsoft microsoft Exchange Server 2016 Cumulative Update 23
Microsoft microsoft Exchange Server 2019 Cumulative Update 14
Microsoft microsoft Exchange Server 2019 Cumulative Update 15
Microsoft microsoft Exchange Server Subscription Edition Rtm
Type Values Removed Values Added
Description Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network. Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Type Values Removed Values Added
Description Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network. Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Type Values Removed Values Added
Description Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Title Microsoft Exchange Server Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft exchange Server 2016
Microsoft exchange Server 2019
Microsoft exchange Server Se
Weaknesses CWE-285
CPEs cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft exchange Server 2016
Microsoft exchange Server 2019
Microsoft exchange Server Se
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'}