{"id":"CVE-2026-40372","title":"Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.","summary":"Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-347","CWE-347"],"published":"2026-04-21","updated":"2026-06-27","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40372","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372","label":"secure@microsoft.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-40372","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2460224","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40372.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.11205,"epssPercentile":0.95819,"ingestedAt":"2026-06-29T13:24:34.826Z","slug":"CVE-2026-40372","body":"## Overview\n\nImproper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":50.1,"likelihood":2.2,"exploitation":0,"ransomware":0},"changes":[]}