CVE-2026-56170: ASP.NET Core Denial of Service Vulnerability
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CSIRTS triage
- What
- Resource allocation without limits allows an unauthorized attacker to deny service over a network.
- Who is affected
- Deployments of ASP.NET Core applications.
- Urgency
- Remediation is high urgency as it can lead to denial of service.
- Action
- Implement resource limits and update to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Moderate exploitation riskCVE-2026-561701.0% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 60% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-56170 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Microsoft DeveloperTools: Multiple vulnerabilitiescert-bund
- highGHSA-j8gr-8fp3-5q5h: Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerabilityghsa
- unknownMultiple vulnerabilities in Microsoft .Net (July 15, 2026)cert-fr-avis
- unknownNCSC-2026-0235 [1.00] [M/H] Vulnerabilities fixed in Microsoft Developer Toolsncsc-nl
- highCVE-2026-56170: Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized at…nvd
Recent advisories for ASP.NET Core Denial
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-50506: OData for ASP.NET and ASP.NET Core Denial of Service Vulnerabilitymsrc · 2026-07-14
- highCVE-2026-45646: OData for ASP.NET and ASP.NET Core Denial of Service Vulnerabilitymsrc · 2026-07-14
- highCVE-2026-45591: ASP.NET Core Denial of Service Vulnerabilitymsrc · 2026-06-09
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