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Vulnerabilities CVE-2021-26855

CVE-2021-26855

Medium
Open
KEV
TLP:CLEAR

Microsoft Exchange Server Remote Code Execution Vulnerability

NVD CVE.org

AI Analysis

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Description

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

Details

EPSS Score ⓘ
100.00%

100th percentile

Confidence
100%
CISA KEV
Date Added
Nov 3, 2021
Patch Due
May 3, 2022
Used in ransomware campaigns
Required Action
Apply updates per vendor instructions.
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