Important CVSS 7.5 EPSS 0.05701 2020-05 archive

Executive Summary

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

Overview

7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Denial of Service
Released May 12 2020
Last Updated May 12 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.05701 — 0.9202 percentile
NVD CVSS 7.5 HIGH — differs from MSRC

CVSS Vector

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

EPSS Score

0.05701
probability of exploitation in the next 30 days
0.9202 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

5 affected products
Product KB Article Severity Impact Restart Required
ASP.NET Core 3.1 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2019 version 16.0 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2019 version 16.5 Release Notes (Security Update) Important Denial of Service Maybe

Patches

1 patch
Article Type Restart
Release Notes Security Update Maybe

Known Exploits

Acknowledgments

None