CVE-2020-1350
Microsoft Windows DNS Server Remote Code Execution Vulnerability
- Published
- Jul 14, 2020
- Updated
- Oct 21, 2025
- Assigning CNA
- microsoft
- Evidence observed
- Nov 3, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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'.
Sources
11Proof-of-concept Denial of Service exploit for CVE-2020-1350 (SIGRed) targeting Windows DNS servers via crafted DNS SIG records. Includes PCAP for detection testing.
Proof-of-concept exploit for CVE-2020-1350, a critical remote code execution vulnerability in Windows DNS Server. Demonstrates exploitation via crafted DNS queries.
- SIGRedDetection
Zeek package for detecting CVE-2020-1350 (SIGRed) Windows DNS server exploit attempts via large DNS SIG/KEY response analysis with configurable fidelity levels.
Responsible use
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