How severe is CVE-2023-38180?

CVE-2023-38180 has a CVSS 3.1 base score of 7.5 (HIGH). EPSS estimates a 14.0% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2023-38180: .NET and Visual Studio Denial of Service Vulnerability

CISA Known Exploited Vulnerabilities

Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2023-08-09

Remediation due

2023-08-30

Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-38180; https://nvd.nist.gov/vuln/detail/CVE-2023-38180

Description

.NET and Visual Studio Denial of Service Vulnerability

Severity

CVSS 3.1 · CNA7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impactpartial

Exploitation Context

as of October 17, 2026

All KEV statistics→

CISA added CVE-2023-38180 to the KEV catalog 1 day after its CVE record was published. The median for entries added in 2023 is 12 days.
It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 27 added in 2023.
Its current EPSS score (14.0%) is higher than that of 30% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Microsoft	Microsoft .NET 6.0	6.0.0 to <6.0.21
Microsoft	Microsoft .NET 7.0	7.0.0 to <7.0.10
Microsoft	Microsoft ASP.NET Core 2.1	2.0 to <2.1.40
Microsoft	Microsoft Microsoft Visual Studio 2022 version 17.2	17.2.0 to <17.2.18
Microsoft	Microsoft Microsoft Visual Studio 2022 version 17.4	17.4.0 to <17.4.10
Microsoft	Microsoft Microsoft Visual Studio 2022 version 17.6	17.6.0 to <17.6.6

References

3 Links

Vendor advisories

.NET and Visual Studio Denial of Service Vulnerability

Other references

Record Details

Published

2023-08-08

Last updated

2026-08-10

Assigner (CNA)

microsoft

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.