VulnerabilityModified

CVE-2021-26423

.NET Core and Visual Studio Denial of Service Vulnerability

HIGH 7.5EPSS 3.90%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

.NET Core and Visual Studio Denial of Service Vulnerability

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 3.90% probability · 90th percentile
CISA KEV: Not listed
Affected: microsoft/.net · microsoft/.net core · microsoft/powershell core · microsoft/visual studio 2017 · microsoft/visual studio 2019
Source: secure@microsoft.com

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26423
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.