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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-34523 Detail

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html CVE, Microsoft Corporation Exploit  Third Party Advisory  VDB Entry 
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523 CVE, Microsoft Corporation Patch  Vendor Advisory 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34523 CISA-ADP US Government Resource 
https://www.zerodayinitiative.com/advisories/ZDI-21-822/ CVE, Microsoft Corporation Third Party Advisory  VDB Entry 

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name Date Added Due Date Required Action
Microsoft Exchange Server Privilege Escalation Vulnerability 11/03/2021 11/17/2021 Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

14 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-34523
NVD Published Date:
07/14/2021
NVD Last Modified:
10/30/2025
Source:
Microsoft Corporation