CVE-2026-45591: ASP.NET Core Denial of Service Vulnerability
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CSIRTS triage
- What
- Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- Who is affected
- Deployments of ASP.NET Core applications.
- Urgency
- Remediation is urgent due to the high severity and potential for denial of service.
- Action
- Implement the recommended patches for ASP.NET Core.
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-2026-45591
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-2026-455912.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 82% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-45591 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiple vulnerabilities in Tenable Identity Exposure (June 24, 2026)cert-fr-avis
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