Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-1350

CVE-2020-1350CRITICAL

Microsoft Windows

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  C  H  H  H   10.0   .9672   99.9   YES

AFFECTED
  Product                                                  Versions       Fixed
  Windows Server                                           2019 –         —
  Windows Server, version 1909 (Server Core installation)  unspecified –  —
  Windows Server, version 1903 (Server Core installation)  unspecified –  —
  Windows Server, version 2004 (Server Core installation)  unspecified –  —

TIMELINE
  Nov 4   Reserved by microsoft
  Jul 14  Published (CNA: microsoft)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-20 · CNA: microsoft · CVSS v3.1 · 3 references · KEV due May 3, 2022

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'.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 4, 2019	Reserved	Reserved by microsoft
July 14, 2020	Published	Published (CNA: microsoft)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 4 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Windows Server	—	2019	—
Microsoft	Windows Server, version 1909 (Server Core installation)	—	unspecified	—
Microsoft	Windows Server, version 1903 (Server Core installation)	—	unspecified	—
Microsoft	Windows Server, version 2004 (Server Core installation)	—	unspecified	—

Weaknesses

CWE-20

References (3)

http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html [x_refsource_MISC]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350 [government-resource]

Authoritative record: CVE-2020-1350 at cve.org

Vendors: microsoft

Weaknesses: CWE-20

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-1350 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.