logo

CVE-2021-26855 - Microsoft Exchange Server Remote Code Execution Vulnerability

CVE-2021-26855

Microsoft | Exchange Server

  • Date Added:
  • 2021-11-03
  • Due Date:
  • 2021-04-16
Vulnerability Name

Microsoft Exchange Server Remote Code Execution Vulnerability

Description

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.

Known To Be Used in Ransomware Campaigns?

Known

Action

Apply updates per vendor instructions.

Additional Notes
Reference CISA's ED 21-02 (https://www.cisa.gov/news-events/directives/ed-21-02-mitigate-microsoft-exchange-premises-product-vulnerabilities) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 21-02. https://nvd.nist.gov/vuln/detail/CVE-2021-26855
Related News Articles

Salt Typhoon hackers backdoor telcos with new GhostSpider malwareNovember 26, 2024

AT&T, Verizon reportedly hacked to target US govt wiretapping platformOctober 7, 2024

Free security scan for your website