CVE-2021-34473

Published: Jul 14, 2021

Modified: Oct 21, 2025

PUBLISHED

CVSS v3.1

9.1

CRITICAL

Microsoft Exchange Server Remote Code Execution Vulnerability

Vendor	Product	Versions
Microsoft	Microsoft Exchange Server 2013 Cumulative Update 23	affected `15.00.0 - < 15.00.1497.015`
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 9	affected `15.02.0 - < 15.02.0858.010`
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 20	affected `15.01.0 - < 15.01.2242.008`
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 19	affected `15.01.0 - < 15.01.2176.012`
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 8	affected `15.02.0 - < 15.02.0792.013`

CVSS v3.1 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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

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