CVE-2020-1350

Microsoft Windows Server, Microsoft Windows Server, version 1909 (Server Core installation), Microsoft Windows Server, version 1903 (Server Core installation)

Published 14 Jul 2020 · updated 17 Jun 2026 · Analyzed

10.0 Critical · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 3 May 2022 for US federal agencies.

Required action: Apply updates per vendor instructions.

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'.

References

packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html · Third Party Advisory, VDB Entry
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350 · Patch, Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1350 · US Government Resource