7.8

CVE-2021-27065

Warning
Exploit

Microsoft Exchange Server Remote Code Execution Vulnerability

Data is provided by the National Vulnerability Database (NVD)
Microsoft ≫ Exchange Server Version2013 Updatecumulative_update_21
Microsoft ≫ Exchange Server Version2013 Updatesp1
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_10
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_11
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_12
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_13
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_14
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_15
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_16
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_17
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_18
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_19
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_8
Microsoft ≫ Exchange Server Version2019 Update-
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_1
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_2
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_3
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_4
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_5
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_6
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_7
Microsoft ≫ Exchange Server Version2019 Updatecumulative_update_8

03.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Exchange Server Remote Code Execution Vulnerability

Vulnerability

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

Description

Apply updates per vendor instructions.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 94.29% 0.999
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6.8 8.6 6.4
AV:N/AC:M/Au:N/C:P/I:P/A:P
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
secure@microsoft.com 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.