{"id":"CVE-2026-102870","sourceIdentifier":"secure@microsoft.com","published":"2026-10-13T19:17:51.617","lastModified":"2026-10-25T18:16:42.253","vulnStatus":"Undergoing Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network."}],"affected":[{"source":"secure@microsoft.com","affectedData":[{"vendor":"Microsoft","product":".NET 10.0 installed on Linux","versions":[{"version":"10.0.0","lessThan":"10.0.403","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 10.0 installed on Mac OS","versions":[{"version":"10.0.0","lessThan":"10.0.403","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 10.0 installed on Windows","versions":[{"version":"10.0.0","lessThan":"10.0.403","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 11.0 installed on Linux","versions":[{"version":"11.0.0-preview.1","lessThan":"11.0.100-rc.3","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 11.0 installed on Mac OS","versions":[{"version":"11.0.0-preview.1","lessThan":"11.0.100-rc.3","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 11.0 installed on Windows","versions":[{"version":"11.0.0-preview.1","lessThan":"11.0.100-rc.3","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2019 version 16.11","versions":[{"version":"16.11.0","lessThan":"16.11.61","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","lessThan":"17.14.43","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.10","versions":[{"version":"18.10.0","lessThan":"18.10.4","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.11","versions":[{"version":"18.11.0","lessThan":"18.11.2","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.12","versions":[{"version":"18.12.0","lessThan":"18.12 Insiders 3","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft.AspNetCore.Components.WebAssembly.DevServer","versions":[{"version":"11.0.0-preview.1","lessThan":"10.0.14","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft.AspNetCore.Components.WebAssembly.Server","platforms":[".NET 10.0 runtime installed on Linux",".NET 10.0 runtime installed on Mac OS",".NET 10.0 runtime installed on Windows",".NET 11.0 runtime installed on Linux",".NET 11.0 runtime installed on Mac OS",".NET 11.0 runtime installed on Windows"],"versions":[{"version":"10.0.0","lessThan":"10.0.13","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:N/UI:R/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-08T00:00:00+00:00","id":"CVE-2026-102870","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-94"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102870","source":"secure@microsoft.com"}]}