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CVE-2019-0548

28
FAUCET Score

CVE-2019-0548 describes a denial of service vulnerability in ASP.NET Core versions 2.1 and 2.2, stemming from improper handling of web requests. This vulnerability carries a high CVSS score of 7.5, indicating it can be exploited remotely with low attack complexity, leading to a complete denial of service without requiring user interaction or privileges. While no public exploit code (Metasploit, Nuclei, ExploitDB) is currently available and it's not listed in CISA's KEV catalog, it has received some community discussion and media coverage, including a mention in Microsoft's January 2019 Patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*
2.2CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.2:*:*:*:*:*:*:*

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
8.21%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0821 is in the 91st percentile among its peer group of 51,506 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: ASP.NET Core 2.2
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet22-dotnet-0:2.2.102-1.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet22-0:2.2-2.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet21-0:2.1-6.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet21-dotnet-0:2.1.503-1.el7
View patch

Vendor Advisories (2)

microsoft2019-Jan/CVE-2019-0548Important

ASP.NET Core Denial of Service Vulnerability

Jan 8, 2019
redhatCVE-2019-0548Moderate

Core: AspNetCoreModule WebSocket DOS

Jan 8, 2019

References

access.redhat.com / errata/RHSA-2019:0040
Third Party Advisory
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2019-0548
PatchVendor Advisory
securityfocus.com / bid/106410
Third Party AdvisoryVDB Entry