{"id":"CVE-2021-34522","aliases":["EUVD-2021-21176","GHSA-6x55-2hvm-xqpr"],"status":"published","title":"Microsoft Defender Remote Code Execution Vulnerability","description":"Microsoft Defender Remote Code Execution Vulnerability","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.02721,"percentile":0.86142,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-07-14T17:54:37Z","modified":"2026-08-10T18:31:47Z","products":[{"vendor":"microsoft","product":"malware_protection_engine"},{"vendor":"microsoft","product":"microsoft malware protection engine"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34522","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34522","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34522"},{"url":"https://github.com/advisories/GHSA-6x55-2hvm-xqpr"}],"sources":{"cve":[{"id":"CVE-2021-34522","title":"Microsoft Defender Remote Code Execution Vulnerability","description":"Microsoft Defender Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:54:37Z","modified":"2026-08-10T15:12:03.205Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21176","description":"Microsoft Defender Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:54:37Z","modified":"2026-08-10T15:12:03Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:03.704262Z"}],"ghsa":[{"id":"GHSA-6x55-2hvm-xqpr","title":"Microsoft Defender Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34464.","description":"Microsoft Defender Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34464.","status":"published","published":"2022-05-24T19:07:48Z","modified":"2026-08-10T18:31:47Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:10:15.270288Z"}],"nvd":[{"id":"CVE-2021-34522","description":"Microsoft Defender Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T18:15:12.313Z","modified":"2026-08-10T16:17:56.727Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}