Vulnerability

CVE-2026-45591

High· 7.5CVSS7.5EPSS2%

.rules3/5

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Threat signal

75/100

High

Severity

high

CVSS

7.5

EPSS

Active

CVSS

v3.1via NVDOpen in FIRST calculator →

7.5/ 10HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactNoneNo confidentiality impact.
Integrity ImpactNoneNo integrity impact.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

1.66%

probability of exploitation in next 30 days

p83

higher than 83% of all CVEs

3-day trend↑ 0pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2026-45591. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCTrack

Total impact on non-trivial mission systems

exploitation: none
automatable: no
impact: total
mission: support

Lifecycle

2026-06-09Vendor advisory · microsoftCVE-2026-45591 — ASP.NET Core Denial of Service Vulnerability
2026-06-09Published
2026-06-09Last modified1 source
2026-06-11Vendor advisory · ubuntuUSN-8420-1 — .NET vulnerabilities

Entity graph

3 nodes · 2 edges · click to pivot

CVEActorVendor advisoryIOCNews

Vendor advisories

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.