CVE-2020-1350CISA KEV

Microsoft Windows DNS Server Remote Code Execution Vulnerability

Severity unknownCVSS unknownCheck the vendor advisory for fixed versions

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA KEV Check MSRC

CISA catalog record

Microsoft Windows DNS Servers fail to properly handle requests, allowing an attacker to perform remote code execution in the context of the Local System Account. The vulnerability is also known under the moniker of SIGRed.

Product: Windows
Added to KEV: 3 Nov 2021
Federal remediation due: 3 May 2022
Known ransomware use: Not reported

Page history

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Field-level log (2)

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23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2020-1350. The catalog has a separate collection scope from Microsoft release records.

More advisories, affected versions and source history

cve-program · CVE-2020-1350

Published

Windows Server

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Windows Server",
                    "vendor": "Microsoft",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2019"
                        },
                        {
                            "status": "affected",
                            "version": "2019  (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2016"
                        },
                        {
                            "status": "affected",
                            "version": "2016  (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2008 for 32-bit Systems Service Pack 2"
                        },
                        {
                            "status": "affected",
                            "version": "2008 for 32-bit Systems Service Pack 2 (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2008 for x64-based Systems Service Pack 2"
                        },
                        {
                            "status": "affected",
                            "version": "2008 for x64-based Systems Service Pack 2 (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2008 R2 for x64-based Systems Service Pack 1"
                        },
                        {
                            "status": "affected",
                            "version": "2008 R2 for x64-based Systems Service Pack 1 (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2012"
                        },
                        {
                            "status": "affected",
                            "version": "2012 (Core installation)"
                        },
                        {
                            "status": "affected",
                            "version": "2012 R2"
                        },
                        {
                            "status": "affected",
                            "version": "2012 R2 (Core installation)"
                        }
                    ]
                }

Windows Server, version 1909 (Server Core installation)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Windows Server, version 1909 (Server Core installation)",
                    "vendor": "Microsoft",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "unspecified"
                        }
                    ]
                }

Windows Server, version 1903 (Server Core installation)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Windows Server, version 1903 (Server Core installation)",
                    "vendor": "Microsoft",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "unspecified"
                        }
                    ]
                }

Windows Server, version 2004 (Server Core installation)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Windows Server, version 2004 (Server Core installation)",
                    "vendor": "Microsoft",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "unspecified"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON