High severity · published Aug 12, 2021
CVE-2021-26423
.NET Core and Visual Studio Denial of Service Vulnerability
7.5
CVSS
3.9%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.9% · higher than 90% 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 5.0.8 · source: NVD
NC
.net Core · Microsoft
2.1 through 2.1.28; 3.1 through 3.1.17 · source: NVD
PC
Powershell Core · Microsoft
7.0 before 7.0.7; 7.1 before 7.1.4 · source: NVD
VS
Visual Studio 2017 · Microsoft
15.0 through 15.9 · source: NVD
VS
Visual Studio 2019 · Microsoft
16.0 through 16.10; 8.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26423
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26423
msrc.microsoft.com
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26423
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423
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