9.8

CVE-2021-26855

Warnung
Exploit

Microsoft Exchange Server Remote Code Execution Vulnerability

Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Exchange Server Version2013 Updatecumulative_update_21
Microsoft ≫ Exchange Server Version2013 Updatecumulative_update_22
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Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_10
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_11
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Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_16
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Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_19
Microsoft ≫ Exchange Server Version2016 Updatecumulative_update_8
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Microsoft ≫ Exchange Server Version2019 Update-
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03.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Exchange Server Remote Code Execution Vulnerability

Schwachstelle

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

Beschreibung

Apply updates per vendor instructions.

Erforderliche Maßnahmen
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 94.3% 0.999
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 10 6.4
AV:N/AC:L/Au:N/C:P/I:P/A:P
nvd@nist.gov 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
secure@microsoft.com 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.