{"cve":"CVE-2021-38644","nvd":{"published":"2021-09-15T12:15:14.910","modified":"2026-08-10T16:18:09.657","status":"Modified","description":"Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38644","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38644"],"products":["microsoft:mpeg-2_video_extension"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-38644","score":0.02294,"percentile":0.83257,"date":"2026-11-01"},"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."]}