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Medium 5.9Published Jun 8, 2021
CVE-2021-31957ASP.NET Core Denial of Service Vulnerability
Updated under an hour ago ()
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It affects microsoft .net and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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ASP.NET Core Denial of Service Vulnerability
- CVSS
- 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft .net microsoft:.net | from 5.0 through 5.0.6 | NVD |
microsoft .net_core microsoft:.net_core | from 3.1 through 3.1.15 | NVD |
microsoft visual_studio_2019 microsoft:visual_studio_2019 | from 16.0 through 16.10; 8.10 | NVD |
fedoraproject fedora fedoraproject:fedora | 33; 34 | NVD |
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4PRVVLXXQEF4SEJOBV3VRJHGX7YHY2CG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVCDYIP4A6DDRT7G6P3ZW6PKNK2DNWJ2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PMHWHRRYDHKM6BIINW5V7OCSW4SDWB4W/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMAO4NG2OQ4PCXUQWMNSCMYWLIJJY6UY/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31957patch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.