CVE-2026-40372

{"id": "CVE-2026-40372", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "published": "2026-04-21T20:16:59.133", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network."}], "lastModified": "2026-04-27T19:57:39.360", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "001BC473-2D30-41BA-8E83-E80A22F519D3", "versionEndExcluding": "10.0.7", "versionStartIncluding": "10.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}