CVE-2020-1118

CVE.org · Published

Record status: Published
Identifier year (not publication year): 2020
Source publication: May 21, 2020
Source updated: Aug 19, 2026
Imported by cveboard: Oct 24, 2026
Source snapshot: cve_2026-10-24_midnight_baseline · Oct 24, 2026

CNA source text (English)

Microsoft Windows Transport Layer Security Denial of Service Vulnerability

A denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges. An attacker who successfully exploited the vulnerability could cause a target system to stop responding. To exploit this vulnerability, a remote unauthenticated attacker could send a specially crafted request to a target system utilizing TLS 1.2 or lower, triggering the system to automatically reboot. The update addresses the vulnerability by changing the way TLS key exchange messages are validated.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

Windows 10 Version 1709

Vendor: Microsoft
Product: Windows 10 Version 1709
Platforms: ARM64-based Systems
x64-based Systems
Default status: Unknown

Windows 10 Version 1709 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1709 for 32-bit Systems

Vendor: Microsoft
Product: Windows 10 Version 1709 for 32-bit Systems
Platforms: 32-bit Systems
Default status: Unknown

Windows 10 Version 1709 for 32-bit Systems · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1803

Vendor: Microsoft
Product: Windows 10 Version 1803
Platforms: 32-bit Systems
ARM64-based Systems
x64-based Systems
Default status: Unknown

Windows 10 Version 1803 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1809

Vendor: Microsoft
Product: Windows 10 Version 1809
Platforms: 32-bit Systems
x64-based Systems
Default status: Unknown

Windows 10 Version 1809 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.17763.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1809

Vendor: Microsoft
Product: Windows 10 Version 1809
Platforms: ARM64-based Systems
Default status: Unknown

Windows 10 Version 1809 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1903 for 32-bit Systems

Vendor: Microsoft
Product: Windows 10 Version 1903 for 32-bit Systems
Platforms: Unknown
Default status: Unknown

Windows 10 Version 1903 for 32-bit Systems · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1903 for ARM64-based Systems

Vendor: Microsoft
Product: Windows 10 Version 1903 for ARM64-based Systems
Platforms: Unknown
Default status: Unknown

Windows 10 Version 1903 for ARM64-based Systems · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1903 for x64-based Systems

Vendor: Microsoft
Product: Windows 10 Version 1903 for x64-based Systems
Platforms: Unknown
Default status: Unknown

Windows 10 Version 1903 for x64-based Systems · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows 10 Version 1909

Vendor: Microsoft
Product: Windows 10 Version 1909
Platforms: 32-bit Systems
ARM64-based Systems
x64-based Systems
Default status: Unknown

Windows 10 Version 1909 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows Server 2019

Vendor: Microsoft
Product: Windows Server 2019
Platforms: x64-based Systems
Default status: Unknown

Windows Server 2019 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.17763.0	`affected`	custom	publication	Unavailable	None listed

Windows Server 2019 (Server Core installation)

Vendor: Microsoft
Product: Windows Server 2019 (Server Core installation)
Platforms: x64-based Systems
Default status: Unknown

Windows Server 2019 (Server Core installation) · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.17763.0	`affected`	custom	publication	Unavailable	None listed

Windows Server, version 1803 (Server Core Installation)

Vendor: Microsoft
Product: Windows Server, version 1803 (Server Core Installation)
Platforms: x64-based Systems
Default status: Unknown

Windows Server, version 1803 (Server Core Installation) · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows Server, version 1903 (Server Core installation)

Vendor: Microsoft
Product: Windows Server, version 1903 (Server Core installation)
Platforms: x64-based Systems
Default status: Unknown

Windows Server, version 1903 (Server Core installation) · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed

Windows Server, version 1909 (Server Core installation)

Vendor: Microsoft
Product: Windows Server, version 1909 (Server Core installation)
Platforms: x64-based Systems
Default status: Unknown

Windows Server, version 1909 (Server Core installation) · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
10.0.0	`affected`	custom	publication	Unavailable	None listed