High 7.5Known exploited (CISA KEV)Published Aug 8, 2023

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

Updated under an hour ago (Oct 28, 2026, 2:00 AM ET)

Does this affect you?

It affects Microsoft .NET 6.0 and 9 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Aug 9, 2023; federal agencies had to remediate by Aug 30, 2023. Treat that date as your deadline.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Microsoft .NET 6.0

Exploited in the last 30 days

.NET and Visual Studio Denial of Service Vulnerability

CVSS: 7.5 HIGH (v3.1, CNA)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
Weakness (CWE): CWE-400
Known exploited: Added to CISA KEV Aug 9, 2023; federal remediation due Aug 30, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 14.13% (percentile 97)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Aug 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft .NET 6.0 microsoft:net_6.0 (from the name)	from 6.0.0 before 6.0.21	CNA record
Microsoft .NET 7.0 microsoft:net_7.0 (from the name)	from 7.0.0 before 7.0.10	CNA record
Microsoft ASP.NET Core 2.1 microsoft:asp.net_core_2.1 (from the name)	from 2.0 before 2.1.40	CNA record
Microsoft Microsoft Visual Studio 2022 version 17.2 microsoft:visual_studio_2022_version_17.2 (from the name)	from 17.2.0 before 17.2.18	CNA record
Microsoft Microsoft Visual Studio 2022 version 17.4 microsoft:visual_studio_2022_version_17.4 (from the name)	from 17.4.0 before 17.4.10	CNA record
Microsoft Microsoft Visual Studio 2022 version 17.6 microsoft:visual_studio_2022_version_17.6 (from the name)	from 17.6.0 before 17.6.6	CNA record
microsoft .net microsoft:.net	from 6.0.0 before 6.0.21; from 7.0.0 before 7.0.10	NVD
microsoft asp.net_core microsoft:asp.net_core	from 2.1 before 2.1.40	NVD
microsoft visual_studio_2022 microsoft:visual_studio_2022	from 17.2.0 before 17.2.18; from 17.4.0 before 17.4.10; from 17.6.0 before 17.6.6	NVD
fedoraproject fedora fedoraproject:fedora	37; 38	NVD

References

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38180	vendor-advisory, patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CL2L4WE5QRT7WEXANYXSKSU43APC5N2V/	mailing-list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWVZFKTLNMNKPZ755EMRYIA6GHFOWGKY/	mailing-list
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38180	us-government-resource

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.