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

.NET and Visual Studio Denial of Service Vulnerability

01What is this vulnerability?

.NET and Visual Studio Denial of Service Vulnerability

02Affected products

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2023-08-09. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-08T18:52:31.790Z
• Last modified: 2025-10-21T23:05:41.434Z
• Added to CISA KEV: 2023-08-09
• BOD 22-01 due: 2023-08-30

09References

• msrc.microsoft.com — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38180