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Vulnerability record · CVE-2020-0603 · published 14 January 2020

CVE-2020-0603: Microsoft asp.net core out-of-bounds write vulnerability

Microsoft · Asp.Net Core

A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory.An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user, aka 'ASP.NET Core Remote Code Execution Vulnerability'.

8.8 CVSS 3.1 High EPSS 21% · top 2.5% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 9.3
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory.An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user, aka 'ASP.NET Core Remote Code Execution Vulnerability'.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2020:0130 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0134 Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0603 PatchVendor Advisory
https://access.redhat.com/errata/RHSA-2020:0130 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0134 Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0603 PatchVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-0603), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.