{"cve":"CVE-2020-1066","nvd":{"published":"2020-05-21T23:15:12.757","modified":"2026-08-19T17:17:12.430","status":"Modified","description":"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 malicious program.\nThe update addresses the vulnerability by correcting how .NET Framework activates COM objects.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066"],"products":["microsoft:.net_framework"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-1066","score":0.02522,"percentile":0.84856,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}