CVE-2026-40372CRITICAL 9.1EPSS p95.5%

CVE-2026-40372CVE-2026-40372

microsoft / asp.net_core

Description

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

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS11.21% probability of exploitation · percentile 95.5% · 2026-08-03T12:00:16Z
Published2026-04-21
Last modified2026-07-15

Underlying weaknesses· 1

CWE-347

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Verification of Cryptographic Signaturecwe-3470%live

Related by meaning· 6

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.