{"schemaVersion":3,"id":"CVE-2020-1065","aliases":["GHSA-9hjg-j983-mqcc"],"status":"published","duplicateOf":null,"title":null,"description":"A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.\nIf the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\nThe security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.","dates":{"published":"2020-05-21T22:52:55.000Z","modified":"2026-08-19T16:33:30.703Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.6,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:H/Au:N/C:C/I:C/A:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.2,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Nuget","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":4.1,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.2,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.6,"severity":"high","vector":"AV:N/AC:H/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.02238,"percentile":0.82574,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.07300000000000015,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.02165},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.02238,"percentile":0.82574}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02165,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02219,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02238,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.02238,"percentile":0.82574}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-787","name":"Out-of-bounds Write","description":"The product writes data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/787.html"}],"affected":[{"vendor":"microsoft","product":"chakracore","name":"chakracore","label":"chakracore","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< publication","noFixRecorded":false,"fixedIn":null},{"text":"< 1.11.19","noFixRecorded":false,"fixedIn":null}],"versionsText":"< publication | < 1.11.19","eol":null,"hubHref":"/vendor/microsoft/chakracore"},{"vendor":"microsoft","product":"edge","name":"Edge","label":"edge","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/microsoft/edge"},{"vendor":"microsoft","product":"microsoft edge (edgehtml-based)","name":"Microsoft Edge (EdgeHTML-based)","label":"microsoft edge (edgehtml-based)","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.0..0, < publication","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.0..0, < publication","eol":null,"hubHref":"/vendor/microsoft/microsoft_edge_edgehtml-based"},{"vendor":"NuGet","product":"Microsoft.ChakraCore","name":"Microsoft.ChakraCore","label":"Microsoft.ChakraCore","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.ChakraCore","purlType":"nuget","versions":[{"text":"< 1.11.19","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.11.19","eol":null,"hubHref":null}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1065","label":"msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1065","hostname":"msrc.microsoft.com","tags":["Vendor Advisory","Patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1065","label":"portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1065","hostname":"portal.msrc.microsoft.com","tags":["X Refsource MISC","X Transferred","WEB","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1065","label":"nvd.nist.gov/vuln/detail/CVE-2020-1065","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/chakra-core/ChakraCore/pull/6447","label":"github.com/chakra-core/ChakraCore/pull/6447","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/chakra-core/ChakraCore/commit/e245029151a5ee35cdcac13567ee11a168801ba3","label":"github.com/chakra-core/ChakraCore/commit/e245029151a5ee35cdcac13567ee11a168801ba3","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/chakra-core/ChakraCore","label":"github.com/chakra-core/ChakraCore","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-05-21T22:52:55.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-19T16:33:30.703Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T19:51:38.830Z","stale":false,"partial":false}}