What’s Vulnerable › Vulnerabilities
CVE-2026-70186: ASP.NET Core Denial of Service Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-31
- Weakness: CWE-833
Description
Deadlock in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Affected products
- Microsoft ASP.NET Core 10.0: from 10.0 before 10.0.13 — fixed in 10.0.13
- Microsoft ASP.NET Core 8.0: from 8.0 before 8.0.32 — fixed in 8.0.32
- Microsoft ASP.NET Core 9.0: from 9.0 before 9.0.21 — fixed in 9.0.21
- Microsoft Visual Studio 2026 version 18.10: from 18.10.0 before 18.10.4 — fixed in 18.10.4
- Microsoft Visual Studio 2022 version 17.14: from 17.14.0 before 17.14.42 — fixed in 17.14.42
How to fix
Upgrade to a fixed version: Microsoft ASP.NET Core 10.0 10.0.13; Microsoft ASP.NET Core 8.0 8.0.32; Microsoft ASP.NET Core 9.0 9.0.21; Microsoft Visual Studio 2026 version 18.10 18.10.4; Microsoft Visual Studio 2022 version 17.14 17.14.42. Check the vendor advisory for mitigations.
References
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