{"id":"CVE-2026-87697","sourceIdentifier":"secure@microsoft.com","published":"2026-10-13T19:21:22.400","lastModified":"2026-10-22T22:19:39.090","vulnStatus":"Undergoing Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network."}],"affected":[{"source":"secure@microsoft.com","affectedData":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","lessThan":"10.0.13","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 11.0 runtime","versions":[{"version":"11.0.0","lessThan":"11.0.0-rc.2","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","lessThan":"8.0.32","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","lessThan":"9.0.21","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","lessThan":"17.14.42","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"}]}]}],"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-2026-87697","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-502"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87697","source":"secure@microsoft.com"}]}