CVE-2025-59249

Published: Oct 14, 2025

Modified: Feb 26, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Vendor	Product	Versions
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 23	affected `15.01.0.0 - < 15.01.2507.061`
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 14	affected `15.02.0.0 - < 15.02.1544.036`
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 15	affected `15.02.0.0 - < 15.02.1748.039`
Microsoft	Microsoft Exchange Server Subscription Edition RTM	affected `15.02.0.0 - < 15.02.2562.029`

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

vendor-advisory

patch

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