Threat Intelligence / CVE / CVE-2026-40372

CVE-2026-40372

CVSS 9.1 (CRITICAL) · EPSS 0.0% · Published 2026-04-21

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

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-347

Threats tracking this CVE

CVE-2026-40372: ASP.NET Core Data Protection Authentication Cookie Forgery Enables Unauthenticated SYSTEM Privilege Escalation — CRITICAL

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372

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