CVE-2021-26855CriticalMicrosoft CVSS 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C

Microsoft security update for CVE-2021-26855 — Microsoft Exchange Server

Published
March 2, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-26855 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26855. This page also shows what EchelonGraph holds for CVE-2021-26855, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products24

  • Microsoft Exchange Server 2013 Cumulative Update 21
  • Microsoft Exchange Server 2013 Cumulative Update 22
  • Microsoft Exchange Server 2013 Cumulative Update 23
  • Microsoft Exchange Server 2016 Cumulative Update 10
  • Microsoft Exchange Server 2016 Cumulative Update 11
  • Microsoft Exchange Server 2016 Cumulative Update 12
  • Microsoft Exchange Server 2016 Cumulative Update 13
  • Microsoft Exchange Server 2016 Cumulative Update 14
  • Microsoft Exchange Server 2016 Cumulative Update 15
  • Microsoft Exchange Server 2016 Cumulative Update 16
  • Microsoft Exchange Server 2016 Cumulative Update 17
  • Microsoft Exchange Server 2016 Cumulative Update 18
  • Microsoft Exchange Server 2016 Cumulative Update 19
  • Microsoft Exchange Server 2016 Cumulative Update 8
  • Microsoft Exchange Server 2016 Cumulative Update 9
  • Microsoft Exchange Server 2019
  • Microsoft Exchange Server 2019 Cumulative Update 1
  • Microsoft Exchange Server 2019 Cumulative Update 2
  • Microsoft Exchange Server 2019 Cumulative Update 3
  • Microsoft Exchange Server 2019 Cumulative Update 4
  • Microsoft Exchange Server 2019 Cumulative Update 5
  • Microsoft Exchange Server 2019 Cumulative Update 6
  • Microsoft Exchange Server 2019 Cumulative Update 7
  • Microsoft Exchange Server 2019 Cumulative Update 8

✅ Updates Microsoft lists: 24 updates

24 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update15.01.2176.009
—Security Update15.02.0792.010
—Security Update15.02.0221.018
—Security Update15.00.1473.006
—Security Update15.02.0397.011
—Security Update15.01.1779.008
—Security Update15.00.1497.012
—Security Update15.02.0464.015
—Security Update15.01.1847.012
—Security Update15.02.0659.012
—Security Update15.01.1913.012
—Security Update15.02.0595.008
—Security Update15.02.0529.013
—Security Update15.01.1979.008
—Security Update15.01.2044.013
—Security Update15.02.0721.013
—Security Update15.01.2106.013
—Security Update15.00.1395.012
—Security Update15.01.1713.010
—Security Update15.01.1415.010
—Security Update15.01.1979.006
—Security Update15.01.1466.016
—Security Update15.01.1531.012
—Security Update15.01.1591.018

🧭 EchelonGraph on CVE-2021-26855

EchelonGraph score
9.8 CRITICAL
CISA KEV
Listed since November 3, 2021
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Microsoft Exchange Server Remote Code Execution Vulnerability

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2021-26855, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (26)