CVE-2021-26877HighMicrosoft CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2021-26877 — Windows

Published
March 9, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-26877 →

📋 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-2021-26877. This page also shows what EchelonGraph holds for CVE-2021-26877, 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 products17

  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server, version 1909 (Server Core installation)
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 20H2 (Server Core Installation)

✅ Updates Microsoft lists: 12 KB articles

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

KB articleUpdateFixed build
KB5000802Security Update10.0.19043.867
KB5000822Security Update10.0.17763.1817
KB5000808Security Update10.0.18363.1440
KB5000803Security Update10.0.14393.4283
KB5000844Monthly Rollup6.0.6003.21070
KB5000856Security Only—
KB5000841Monthly Rollup6.1.7601.24566
KB5000851Security Only—
KB5000847Monthly Rollup6.2.9200.23298
KB5000840Security Only—
KB5000848Monthly Rollup6.3.9600.19968
KB5000853Security Only—

🧭 EchelonGraph on CVE-2021-26877

EchelonGraph score
9.8 CRITICAL
CISA KEV
Not listed
Fix status
A fix is available — apply it.

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

Windows DNS Server Remote Code Execution Vulnerability

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2021-26877, 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 (25)