{"id":"CVE-2026-47300","aliases":[],"cve":{"records":[{"id":"CVE-2026-47300","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-05-18T23:53:33.897Z","published":"2026-07-14T18:20:12.225Z","modified":"2026-10-28T20:01:08.840Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-28T20:01:08.840Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-07-15T10:57:52.578Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-303","description":"CWE-303: Incorrect Implementation of Authentication Algorithm","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.29"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.18"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.12.0","versionEndExcluding":"17.12.22"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.14.0","versionEndExcluding":"17.14.36"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*","versionStartIncluding":"18.0","versionEndExcluding":"18.7.4"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-07-15T03:57:39.408951Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"ASP.NET Core Elevation of Privilege Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.","score":8.8,"severity":"high","published":"2026-07-14T18:20:12.225Z","modified":"2026-10-28T20:01:08.840Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":".NET 10.0 runtime","platforms":[],"versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.10","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"},{"vendor":"Microsoft","name":".NET 8.0 runtime","platforms":[],"versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.29","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"},{"vendor":"Microsoft","name":".NET 9.0 runtime","platforms":[],"versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.18","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"},{"vendor":"Microsoft","name":"Microsoft Visual Studio 2022 version 17.12","platforms":[],"versions":[{"version":"17.12.0","status":"affected","lessThan":"17.12.22","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"},{"vendor":"Microsoft","name":"Microsoft Visual Studio 2022 version 17.14","platforms":[],"versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.36","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"},{"vendor":"Microsoft","name":"Microsoft Visual Studio 2026 version 18.7","platforms":[],"versions":[{"version":"18.0","status":"affected","lessThan":"18.7.4","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300"],"sources":[{"name":"CVE","id":"CVE-2026-47300","modified":"2026-10-28T20:01:08.840Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8.8}],"sourceAffected":[],"observedAt":"2026-10-29T14:38:21.053Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:20:31.980Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"ASP.NET Core has an elevation of privilege vulnerability due to incorrect implementation of the authentication algorithm, affecting .NET 8.0-10.0 runtimes and Microsoft Visual Studio 2022 and 2026 versions. An authorized attacker may exploit this over a network. The vulnerability is caused by CWE-303, incorrect implementation of authentication algorithm.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:59:22.650Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-47300"}]}}