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CVE-2021-26412— Microsoft Exchange Server Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Microsoft Exchange Server 2013 Cumulative Update 23
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server 存在安全漏洞。以下产品和版本受到影响：Microsoft Exchange Server 2013 Cumulative Update 23,Microsoft Exchange Server 2019 Cumulative Update 7,Microsoft Exchange Ser

CVSS 9.1 · Critical EPSS 33.76% · P98

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0< 15.00.1497.012 affected
Microsoft Microsoft Exchange Server 2016 Cumulative Update 18 15.01.0< 15.01.2106.013 affected
Microsoft Microsoft Exchange Server 2016 Cumulative Update 19 15.01.0< 15.01.2176.009 affected
Microsoft Microsoft Exchange Server 2019 Cumulative Update 7 15.02.0< 15.02.0721.013 affected
Microsoft Microsoft Exchange Server 2019 Cumulative Update 8 15.02.0< 15.02.0792.010 affected
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I. Basic Information for CVE-2021-26412

Vulnerability Information
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Vulnerability Title
Microsoft Exchange Server Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server 存在安全漏洞。以下产品和版本受到影响：Microsoft Exchange Server 2013 Cumulative Update 23,Microsoft Exchange Server 2019 Cumulative Update 7,Microsoft Exchange Ser
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0 ~ 15.00.1497.012 -
Microsoft Microsoft Exchange Server 2016 Cumulative Update 18 15.01.0 ~ 15.01.2106.013 -
Microsoft Microsoft Exchange Server 2016 Cumulative Update 19 15.01.0 ~ 15.01.2176.009 -
Microsoft Microsoft Exchange Server 2019 Cumulative Update 7 15.02.0 ~ 15.02.0721.013 -
Microsoft Microsoft Exchange Server 2019 Cumulative Update 8 15.02.0 ~ 15.02.0792.010 -

II. Public POCs for CVE-2021-26412

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III. Intelligence Information for CVE-2021-26412

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Vendor Advisories for CVE-2021-26412 (2)

Same Patch Batch · Microsoft · 2021-03-02 · 7 CVEs total

CVE-2021-27078 9.1 CRITICAL Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26855 9.1 CRITICAL Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-27065 7.8 HIGH Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26858 7.8 HIGH Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26857 7.8 HIGH Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26854 6.6 MEDIUM Microsoft Exchange Server Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Exchange Server 2013 Cumulative Update 23
Same vendor: Microsoft

V. Comments for CVE-2021-26412

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