CVE-2020-0602Network attack vector

Unauthenticated service interruption via crafted web requests

Published Jan 14, 2020 · Updated Aug 4, 2024

Denial of service in Microsoft ASP.NET Core 2.1, 3.0, and 3.1 allows remote attackers to interrupt web applications via crafted requests. Microsoft has not published the request-processing locus or malformed input condition that triggers the failure. No authentication or user interaction is required, and the documented consequence is limited to denial of service against the targeted application.

CVSS severity7.5
High
EPSS probability7.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Microsoft ASP.NET Core 2.1, 3.0, and 3.1 allows remote attackers to interrupt web applications via crafted requests. Microsoft has not published the request-processing locus or malformed input condition that triggers the failure. No authentication or user interaction is required, and the documented consequence is limited to denial of service against the targeted application.

The record

CVE
CVE-2020-0602
Published
Jan 14, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
ASP.NET Core
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1
  2. Affected versionversion=3.0
  3. Affected versionversion=3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · ASP.NET Coreversion=2.1; version=3.0; version=3.1

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo