Microsoft ASP.NET Core 9.0 vulnerabilities

7 CVEs affecting Microsoft ASP.NET Core 9.0, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-96236, published 2026-10-13.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2026-96236, published 2026-10-13. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVE-2026-70181, published 2026-10-13. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVE-2026-70186, published 2026-10-13. High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days. Deadlock in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVE-2026-70188, published 2026-10-13. Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days. Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-70196, published 2026-10-13. Medium severity, CVSS 5.9. EPSS: 0.8% chance of exploitation in the next 30 days. Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVE-2026-70175, published 2026-10-13. High severity, CVSS 8.1. EPSS: 0.6% chance of exploitation in the next 30 days. Improper authentication in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-70183, published 2026-10-13. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. Concurrent execution using shared resource with improper synchronization ('race condition') in ASP.NET Core allows an authorized attacker to elevate privileges over a network.