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CVE-2020-1350

Microsoft Windows DNS Server Remote Code Execution Vulnerability

  • Critical 10.0
  • Exploited: added to CISA KEV 3 Nov 2021

Description

A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.

Key facts

Published
14 Jul 2020
Last changed
21 Oct 2025
Assigned by
microsoft
KEV added
3 Nov 2021
KEV fix due
3 May 2022
EPSS
96.721% likely to be exploited in the next 30 days, higher than 99.886% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 10.0CVSS 3.1, Criticalfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

  • Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
MicrosoftWindows Server
  • 2019 (affected)
  • 2019 (Core installation) (affected)
  • 2016 (affected)
  • 2016 (Core installation) (affected)
  • 2008 for 32-bit Systems Service Pack 2 (affected)
  • 2008 for 32-bit Systems Service Pack 2 (Core installation) (affected)
  • 2008 for x64-based Systems Service Pack 2 (affected)
  • 2008 for x64-based Systems Service Pack 2 (Core installation) (affected)
  • 2008 R2 for x64-based Systems Service Pack 1 (affected)
  • 2008 R2 for x64-based Systems Service Pack 1 (Core installation) (affected)
  • 2012 (affected)
  • 2012 (Core installation) (affected)
  • 2012 R2 (affected)
  • 2012 R2 (Core installation) (affected)
MicrosoftWindows Server, version 1909 (Server Core installation)
  • unspecified (affected)
MicrosoftWindows Server, version 1903 (Server Core installation)
  • unspecified (affected)
MicrosoftWindows Server, version 2004 (Server Core installation)
  • unspecified (affected)

Timeline

  1. 14 Jul 2020 Published
  2. 3 Nov 2021 CVE-2020-1350 added to CISA KEV
  3. 3 Nov 2021 Added to the CISA KEV catalogue

Weakness

References