6.8

CVE-2021-26857

Warnung

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Exchange Server Version 2010 Update sp3
Microsoft ≫ Exchange Server Version 2013 Update cumulative_update_21
Microsoft ≫ Exchange Server Version 2013 Update cumulative_update_22
Microsoft ≫ Exchange Server Version 2013 Update cumulative_update_23
Microsoft ≫ Exchange Server Version 2013 Update sp1
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_10
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_11
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_12
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_13
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_14
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_15
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_16
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_17
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_18
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_19
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_8
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_9
Microsoft ≫ Exchange Server Version 2019 Update -
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_1
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_2
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_3
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_4
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_5
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_6
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_7
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_8

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 95.76% 0.999
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.8 8.6 6.4
AV:N/AC:M/Au:N/C:P/I:P/A:P
NIST 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
Microsoft 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-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26857
Patch
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26857
US Government Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26857
Patch
Vendor Advisory