CVE-2021-34473critical
New! CVE Severity Now Using CVSS v3
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Description
Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31196, CVE-2021-31206.
References
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473
https://www.zerodayinitiative.com/advisories/ZDI-21-821/
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
Details
Source: MITRE
Published: 2021-07-14
Updated: 2021-09-21
Type: NVD-CWE-noinfo
Risk Information
CVSS v2
Base Score: 10
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 10
Severity: HIGH
CVSS v3
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL
Vulnerable Software
Configuration 1
OR
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 152458 | Microsoft Exchange Server RCE (ProxyShell) | Nessus | Windows | critical |
| 148476 | Security Updates for Microsoft Exchange Server (April 2021) | Nessus | Windows : Microsoft Bulletins | critical |