{"id":"CVE-2020-1066","title":"An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malic…","summary":"An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malic…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"microsoft","product":".net_framework","affected":[".net_framework = 3.0",".net_framework = 3.5.1"],"published":"2020-05-21","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-1066","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","exploit-available"],"epss":0.02501,"epssPercentile":0.84023,"ingestedAt":"2026-08-19T17:42:36.861Z","exploits":{"github":2,"githubRepos":["https://github.com/cbwang505/CVE-2020-1066-EXP","https://github.com/xyddnljydd/cve-2020-1066"],"checkedAt":"2026-09-24T07:52:46.973Z"},"exploitAvailable":true,"slug":"CVE-2020-1066","body":"## Overview\n\nAn elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.\nThe update addresses the vulnerability by correcting how .NET Framework activates COM objects.\n\n## Affected\n\n- `.net_framework = 3.0`\n- `.net_framework = 3.5.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0.5,"exploitation":12,"ransomware":0},"changes":[{"seq":4468,"id":"CVE-2020-1066","ts":1788887181819,"field":"exploit_available","old":"false","new":"true"},{"seq":3351,"id":"CVE-2020-1066","ts":1788886300874,"field":"exploit_available","old":"true","new":"false"},{"seq":2206,"id":"CVE-2020-1066","ts":1788882970640,"field":"exploit_available","old":"false","new":"true"},{"seq":1235,"id":"CVE-2020-1066","ts":1788882382161,"field":"exploit_available","old":"true","new":"false"},{"seq":349,"id":"CVE-2020-1066","ts":1788881816794,"field":"exploit_available","old":"false","new":"true"}]}