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Vulnerability record · CVE-2021-31957 · published 8 June 2021
CVE-2021-31957: Microsoft .net vulnerability
Microsoft · .Net
ASP.NET Core Denial of Service Vulnerability
5.9 CVSS 3.1 Medium EPSS 5.1% · top 7.9%
5.9CVSS 3.1 base score, v2 5.0
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD
Description
ASP.NET Core Denial of Service Vulnerability
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
Track CVE-2021-31957 inside VULONE
Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.
Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
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Source: NIST National Vulnerability Database (record CVE-2021-31957), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.
