01 Record

CVE-2018-8421

A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input, aka ".NET Framework Remote Code Execution Vulnerability." This affects Microsoft .NET Framework

UnratedPUBLISHEDCNA: microsoft

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input, aka ".NET Framework Remote Code Execution Vulnerability." This affects Microsoft .NET Framework

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 29.07% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 98.0% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2018-09-13 00:00Z8 YR AGO

Last updated

2024-08-05 06:54Z2 YR AGO

Reserved

2018-03-14

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

fe0aae82a9e1189be67df297ee172f99479f33b5c2a73ae81742a1dcb16b92f4

05 Affected products

VendorProductVersionsPlatforms

MicrosoftMicrosoft .NET Framework2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2, 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2, 3.5 on Windows 10 for 32-bit Systems, 3.5 on Windows 10 for x64-based Systems, 3.5 on Windows 10 Version 1607 for 32-bit Systems, 3.5 on Windows 10 Version 1607 for x64-based Systems, 3.5 on Windows 10 Version 1703 for 32-bit Systems, 3.5 on Windows 10 Version 1703 for x64-based Systems, 3.5 on Windows 10 Version 1709 for 32-bit Systems, 3.5 on Windows 10 Version 1709 for x64-based Systems, 3.5 on Windows 10 Version 1803 for 32-bit Systems, 3.5 on Windows 10 Version 1803 for x64-based Systems, 3.5 on Windows 8.1 for 32-bit systems, 3.5 on Windows 8.1 for x64-based systems, 3.5 on Windows Server 2012, 3.5 on Windows Server 2012 (Server Core installation), 3.5 on Windows Server 2012 R2, 3.5 on Windows Server 2012 R2 (Server Core installation), 3.5 on Windows Server 2016, 3.5 on Windows Server 2016 (Server Core installation), 3.5 on Windows Server, version 1709 (Server Core Installation), 3.5 on Windows Server, version 1803 (Server Core Installation), 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1, 3.5.1 on Windows 7 for x64-based Systems Service Pack 1, 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1, 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1, 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1, 4.5.2 on Windows 7 for x64-based Systems Service Pack 1, 4.5.2 on Windows 8.1 for 32-bit systems, 4.5.2 on Windows 8.1 for x64-based systems, 4.5.2 on Windows RT 8.1, 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2, 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2, 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1, 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), 4.5.2 on Windows Server 2012, 4.5.2 on Windows Server 2012 (Server Core installation), 4.5.2 on Windows Server 2012 R2, 4.5.2 on Windows Server 2012 R2 (Server Core installation), 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2, 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2, 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems, 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems, 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016, 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation), 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows 8.1 for x64-based systems, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows RT 8.1, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation), 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 R2, 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation), 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems, 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems, 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation), 4.7.2 on Windows 10 Version 1803 for 32-bit Systems, 4.7.2 on Windows 10 Version 1803 for x64-based Systems, 4.7.2 on Windows Server, version 1803 (Server Core Installation), 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit Systems, 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based Systems—

06 References

portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8421x_refsource_CONFIRM
www.securitytracker.com1041636http://www.securitytracker.com/id/1041636vdb-entryx_refsource_SECTRACK
www.securityfocus.com105222http://www.securityfocus.com/bid/105222vdb-entryx_refsource_BID