{"id":"CVE-2026-47300","sourceIdentifier":"secure@microsoft.com","published":"2026-07-14T19:17:08.303","lastModified":"2026-10-28T20:17:27.937","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network."}],"affected":[{"source":"secure@microsoft.com","affectedData":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","lessThan":"10.0.10","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","lessThan":"8.0.29","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","lessThan":"9.0.18","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.12","versions":[{"version":"17.12.0","lessThan":"17.12.22","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","lessThan":"17.14.36","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.7","versions":[{"version":"18.0","lessThan":"18.7.4","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"secure@microsoft.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-15T03:57:39.408951Z","id":"CVE-2026-47300","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"secure@microsoft.com","type":"Secondary","description":[{"lang":"en","value":"CWE-303"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.29","matchCriteriaId":"1144FF26-EDCE-4609-A3E8-56DD190B0953"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.18","matchCriteriaId":"140E7E20-8E57-462D-B4B5-8A26B4A23925"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","matchCriteriaId":"387021A0-AF36-463C-A605-32EA7DAC172E"},{"vulnerable":false,"criteria":"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*","matchCriteriaId":"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"},{"vulnerable":false,"criteria":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","matchCriteriaId":"A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]},{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.6","matchCriteriaId":"CD89D801-933E-4D78-9187-D2CA94370FA0"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*","matchCriteriaId":"387021A0-AF36-463C-A605-32EA7DAC172E"},{"vulnerable":false,"criteria":"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*","matchCriteriaId":"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.12.0","versionEndExcluding":"17.12.22","matchCriteriaId":"198B86D0-5A5A-49AF-8095-FB2E481E9440"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.14.0","versionEndExcluding":"17.14.36","matchCriteriaId":"03F88475-3382-48DF-B2C7-7DCDA8A0EBE7"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*","versionStartIncluding":"18.7.0","versionEndExcluding":"18.7.4","matchCriteriaId":"B3FFA460-81F9-43AF-BA00-49AA2D4F0C51"}]}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300","source":"secure@microsoft.com","tags":["Patch","Vendor Advisory"]}]}