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CVE-2017-8585

29
FAUCET Score

CVE-2017-8585 is a Denial of Service vulnerability affecting Microsoft .NET Framework versions 4.6, 4.6.1, 4.6.2, and 4.7, allowing an attacker to crash a .NET web application with specially crafted requests. This vulnerability carries a high CVSS score of 7.5, indicating it can be exploited remotely with low attack complexity and no user interaction, leading to a complete loss of availability for affected systems. While there is no known public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed in CISA's KEV catalog, it has garnered some community discussion and media coverage, suggesting awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
4.6CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:4.6:*:*:*:*:*:*:*
4.6.1CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:4.6.1:*:*:*:*:*:*:*
4.6.2CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*
4.7CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
9.50%
Probability of exploitation in next 30 days
EPSS Percentile
94.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0950 is in the 92nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (28)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: 10957-10951
View patch
microsoftpatch availablevia msrc
Product: 10957-10952
View patch
microsoftpatch availablevia msrc
Product: 10728-10729
View patch
microsoftpatch availablevia msrc
Product: 10728-10735
View patch
microsoftpatch availablevia msrc
Product: 10808-10789
View patch
microsoftpatch availablevia msrc
Product: 10808-10788
View patch
microsoftpatch availablevia msrc
Product: 11437-10852
View patch
microsoftpatch availablevia msrc
Product: 11437-10853
View patch
microsoftpatch availablevia msrc
Product: 11437-10816
View patch
microsoftpatch availablevia msrc
Product: 11437-10855
View patch
microsoftpatch availablevia msrc
Product: .NET Core 1.0
View patch
microsoftpatch availablevia msrc
Product: .NET Core 1.1
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6 on Windows 10 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6 on Windows 10 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for 32-bit Systems
View patch
nugetpatch availablevia ghsa
Product: Microsoft.NETCore.AppFixed in: 1.0.7
nugetpatch availablevia ghsa
Product: Microsoft.NETCore.AppFixed in: 1.1.4
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnetcore11-dotnetcore-0:1.1.5-1.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet20-dotnet-0:2.0.3-4.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnetcore10-dotnetcore-0:1.0.8-1.el7
View patch

Vendor Advisories (3)

nugetGHSA-8884-xcr4-r68phigh

Improper Input Validation in Microsoft.NETCore.App

May 17, 2022
redhatCVE-2017-8585Low

Core: DoS via invalid culture

Nov 14, 2017
microsoft2017-Jul/CVE-2017-8585Important

.NET Denial of Service Vulnerability

Jul 11, 2017

References

access.redhat.com / errata/RHSA-2017:3248
portal.msrc.microsoft.com / en-us/security-guidance/advisory/CVE-2017-8585
PatchVendor Advisory
securityfocus.com / bid/99432
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038864
Third Party AdvisoryVDB Entry