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Vulnerability & Exploit Database

Vulnerabilities and exploits collected over reliable resources for security professionals and researchers to review

Microsoft CVE-2021-26857: Microsoft Exchange Server Remote Code Execution Vulnerability (HAFNIUM Exploited)

Severity:
7
CVSS:
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published:
03/02/2021
Created:
03/03/2021
Added:
03/02/2021
Modified:
03/02/2021

Description:

There exists an insecure deserialization vulnerability in the Unified Messaging service. Insecure deserialization is where untrusted user-controllable data is deserialized by a program. Exploiting this vulnerability gave HAFNIUM the ability to run code as SYSTEM on the Exchange server. This requires administrator permission or another vulnerability to exploit.'

Solution(s)


  • msft-kb5000871-2dbdda16-f1ba-4b6a-891c-f92d6c05647c
  • msft-kb5000871-30386cf9-1373-4798-90b7-056d667875b3
  • msft-kb5000871-3ef89683-3703-4a5d-b855-38579ba99a85
  • msft-kb5000871-c6ed44ca-634b-4b5c-91ba-12232d8ec98e
  • msft-kb5000871-dbbef9bc-f60b-4ee9-9d7d-22899fe76e70
  • msft-kb5000978-4ecf02e7-963b-42d5-8c3d-07c90ec7f059
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