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CVE-2018-8409

27
FAUCET Score

CVE-2018-8409 describes a denial of service vulnerability within System.IO.Pipelines, impacting .NET Core 2.1, ASP.NET Core 2.1, and System.IO.Pipelines. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low complexity, requiring no user interaction, to achieve a complete denial of service. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has received notable community discussion and media coverage, suggesting awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.1, < 2.1.4CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*
>= 2.1, < 2.1.4CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
4.5.0CPE matchmatch criteria
cpe:2.3:a:microsoft:system.io.pipelines:4.5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
6.56%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0656 is in the 88th percentile among its peer group of 51,485 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 (7)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.1
View patch
microsoftpatch availablevia msrc
Product: System.IO.Pipelines
View patch
microsoftpatch availablevia msrc
Product: .NET Core 2.1
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 2.1.4
nugetpatch availablevia ghsa
Product: System.IO.PipelinesFixed in: 4.5.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.1.4

Vendor Advisories (3)

nugetGHSA-j378-6mmw-hqfrhigh

Denial of service vulnerability exists when System.IO.Pipelines improperly handles requests

Oct 16, 2018
microsoft2018-Sep/CVE-2018-8409Important

System.IO.Pipelines Denial of Service

Sep 11, 2018
redhatCVE-2018-8409Low

NET: Resource loop in ReadAsync when it is being cancelled while producer allocates memory using GetMemory

Sep 11, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8409
PatchVendor Advisory
securityfocus.com / bid/105223
Third Party AdvisoryVDB Entry