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CVE-2021-42321— Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS 8.8 · High KEV · Ransomware EPSS 93.62% · P100
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I. Basic Information for CVE-2021-42321

Vulnerability Information
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Vulnerability Title
Microsoft Exchange Server Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 2019 Cumulative Update 10,Microsoft Exchange Server 2016 Cumulative Update 22,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)

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Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 21 15.01.0 ~ 15.01.2308.020 cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 10 15.02.0 ~ 15.02.0792.019 cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 22 15.0.0 ~ 15.01.2375.017 cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 11 15.02.0 ~ 15.02.0986.014 cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*

II. Public POCs for CVE-2021-42321

#POC DescriptionSource LinkShenlong Link
1Microsoft Exchange Server Pochttps://github.com/DarkSprings/CVE-2021-42321POC Details
2Clone from gisthttps://github.com/timb-machine-mirrors/testanull-CVE-2021-42321_poc.pyPOC Details
3Nonehttps://github.com/xnyuq/cve-2021-42321POC Details
4Nonehttps://github.com/7BitsTeam/exch_CVE-2021-42321POC Details
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III. Intelligence Information for CVE-2021-42321

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Same Patch Batch · Microsoft · 2021-11-10 · 54 CVEs total

CVE-2021-264439.0 CRITICALMicrosoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability
CVE-2021-386668.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2021-423168.8 HIGHMicrosoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
CVE-2021-422838.8 HIGHNTFS Elevation of Privilege Vulnerability
CVE-2021-422758.8 HIGHMicrosoft COM for Windows Remote Code Execution Vulnerability
CVE-2021-422927.8 HIGHMicrosoft Excel Security Feature Bypass Vulnerability
CVE-2021-432087.8 HIGH3D Viewer Remote Code Execution Vulnerability
CVE-2021-422967.8 HIGHMicrosoft Word Remote Code Execution Vulnerability
CVE-2021-422987.8 HIGHMicrosoft Defender Remote Code Execution Vulnerability
CVE-2021-432097.8 HIGH3D Viewer Remote Code Execution Vulnerability
CVE-2021-422867.8 HIGHWindows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege
CVE-2021-422857.8 HIGHWindows Kernel Elevation of Privilege Vulnerability
CVE-2021-422767.8 HIGHMicrosoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2021-413787.8 HIGHWindows NTFS Remote Code Execution Vulnerability
CVE-2021-413777.8 HIGHWindows Fast FAT File System Driver Elevation of Privilege Vulnerability
CVE-2021-413707.8 HIGHNTFS Elevation of Privilege Vulnerability
CVE-2021-413677.8 HIGHNTFS Elevation of Privilege Vulnerability
CVE-2021-413667.8 HIGHCredential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerabili
CVE-2021-404427.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2021-369577.8 HIGHWindows Desktop Bridge Elevation of Privilege Vulnerability

Showing top 20 of 54 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Microsoft Exchange Server 2016 Cumulative Update 21
Same vendor: Microsoft

V. Comments for CVE-2021-42321

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