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CriticalASP.NET

CVE-2026-40372

Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

CVSS Base Score
9.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Probability
96%EPSS PERCENTILE0100

More exploitable than 96% of all CVEs · Top 4%

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Details
Published
2026-04-21
Last modified
2026-07-15
Affected
ASP.NET
References
NVD Detail OSV.dev GitHub Advisories

Data from the National Vulnerability Database (NVD), CISA KEV, and FIRST.org EPSS. This product uses the NVD API but is not endorsed or certified by the NVD. EPSS is a probability estimate, not a guarantee of exploitation.