# Asp.net Core vulnerabilities > Asp.net Core is made by Microsoft. We track 34 published vulnerabilities in it, across 221 versions. 2 of them are on the list of flaws known to be exploited, the newest added on 10 October 2023. If you run Asp.net Core, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/microsoft/asp.net_core ## At a glance - **Made by:** [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) - **Published vulnerabilities:** 34 - **Known to be exploited:** 2 - **Versions tracked:** 221 - **Most recently added to the known-exploited list:** [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487), 10 October 2023. We keep watching the list. ## Which versions of Asp.net Core do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "6.0.0 to before 6.0.23" means from 6.0.0 up to, but not including, 6.0.23. - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487) (HTTP/2 Rapid Reset Attack Vulnerability): 6.0.0 to before 6.0.23, 7.0.0 to before 7.0.12 - [CVE-2023-38180](https://www.precursorintelligence.com/what-is/cve-2023-38180) (Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability): 2.1 to before 2.1.40 ## Which Asp.net Core vulnerabilities are being exploited? 2 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487): HTTP/2 Rapid Reset Attack Vulnerability. High, CVSS 7.5, chance of use in 30 days >99%, known exploited since 10 October 2023. - [CVE-2023-38180](https://www.precursorintelligence.com/what-is/cve-2023-38180): Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability. High, CVSS 7.5, chance of use in 30 days 14%, known exploited since 9 August 2023. ## Which Asp.net Core flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2023-44487](https://www.precursorintelligence.com/what-is/cve-2023-44487): >99%, High (CVSS 7.5), known exploited - [CVE-2025-55315](https://www.precursorintelligence.com/what-is/cve-2025-55315): 66%, Critical (CVSS 9.9) - [CVE-2020-0603](https://www.precursorintelligence.com/what-is/cve-2020-0603): 21%, High (CVSS 8.8) - [CVE-2023-38180](https://www.precursorintelligence.com/what-is/cve-2023-38180): 14%, High (CVSS 7.5), known exploited - [CVE-2018-8171](https://www.precursorintelligence.com/what-is/cve-2018-8171): 11%, High (CVSS 7.5) - [CVE-2017-8700](https://www.precursorintelligence.com/what-is/cve-2017-8700): 10%, High (CVSS 7.5) - [CVE-2018-0787](https://www.precursorintelligence.com/what-is/cve-2018-0787): 9.6%, High (CVSS 8.8) - [CVE-2017-11879](https://www.precursorintelligence.com/what-is/cve-2017-11879): 9.4%, High (CVSS 8.8) ## Questions ### How many vulnerabilities does Asp.net Core have? We track 34 published vulnerabilities listed under the name Asp.net Core, across 221 versions. The most recent Asp.net Core flaw added to the known-exploited list is CVE-2023-44487, on 10 October 2023. ### Which Asp.net Core vulnerabilities are being exploited? 2 are on the list of flaws known to be exploited. The most recently added are CVE-2023-44487 and CVE-2023-38180. ### Which versions of Asp.net Core do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2023-44487, affects 6.0.0 to before 6.0.23, 7.0.0 to before 7.0.12. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Asp.net Core? Create a Precursor Intelligence account and track Asp.net Core. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Asp.net Core? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact