Medium severity · published Feb 25, 2021
CVE-2021-1721
.NET Core and Visual Studio Denial of Service Vulnerability
6.5
CVSS
3.3%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
.net · Microsoft
5.0 through 5.0.2 · source: NVD
NC
.net Core · Microsoft
2.1 through 2.1.24; 3.1 through 3.1.11 · source: NVD
PC
Powershell Core · Microsoft
7.0; 7.1 · source: NVD
VS
Visual Studio 2017 · Microsoft
15.0 through 15.9 · source: NVD
VS
Visual Studio 2019 · Microsoft
16.0 through 16.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-1721
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-1721
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721
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