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CVE-2017-11883

24
FAUCET Score

CVE-2017-11883 is a denial-of-service vulnerability affecting .NET Core versions 1.0, 1.1, and 2.0, allowing an unauthenticated attacker to remotely disrupt web applications by sending malformed requests. It carries a high CVSS score of 7.5 due to its network-based attack vector and low attack complexity, leading to a complete loss of availability. While not listed in CISA's KEV catalog and lacking public exploit code in Metasploit or ExploitDB, its high FAUCET Risk Score of 95/100 and community discussion indicate significant concern. Media coverage also confirms its inclusion in a Microsoft Patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:microsoft:aspnetcore:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:microsoft:aspnetcore:1.1:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:aspnetcore:2.0:*:*:*:*:*:*:*

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
8.53%
Probability of exploitation in next 30 days
EPSS Percentile
94.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0853 is in the 91st 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 (9)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.0
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 1.1
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 1.0
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.WebListenerFixed in: 1.0.6
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.HttpSysFixed in: 2.0.2
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.WebListenerFixed in: 1.1.4
nugetpatch availablevia ghsa
Product: Microsoft.Net.Http.ServerFixed in: 1.0.6
nugetpatch availablevia ghsa
Product: Microsoft.Net.Http.ServerFixed in: 1.1.4

Vendor Advisories (3)

nugetGHSA-f9jc-rrm2-pmfghigh

Denial of service in ASP.NET Core

May 13, 2022
microsoft2017-Nov/CVE-2017-11883Important

ASP.NET Core Denial of Service Vulnerability

Nov 14, 2017
redhatCVE-2017-11883Important

Core: DoS due to improper handling of web requests

Nov 14, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-11883
PatchVendor Advisory
securityfocus.com / bid/101835
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039793
Third Party AdvisoryVDB Entry