{"id":"CVE-2021-30821","aliases":["EUVD-2021-17738","GHSA-m4jj-5845-6577"],"status":"published","title":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in...","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","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","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01072,"percentile":0.65357,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-10-28T18:17:13Z","modified":"2026-06-17T03:50:57Z","products":[{"vendor":"apple","product":"mac_os_x"},{"vendor":"apple","product":"macos"}],"references":[{"url":"https://support.apple.com/en-us/HT212869","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212871","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212872","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30821"},{"url":"https://github.com/advisories/GHSA-m4jj-5845-6577"}],"sources":{"cve":[{"id":"CVE-2021-30821","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-10-28T18:17:13Z","modified":"2024-08-03T22:48:12.69Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17738","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-10-28T18:17:13Z","modified":"2024-08-03T22:48:12Z","updated_at":"2026-11-03T03:24:41.017854Z"}],"ghsa":[{"id":"GHSA-m4jj-5845-6577","title":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in...","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2022-05-24T19:19:01Z","modified":"2023-01-30T05:03:25Z","updated_at":"2026-11-02T14:46:50.018589Z"}],"nvd":[{"id":"CVE-2021-30821","description":"A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-10-28T19:15:09.047Z","modified":"2026-06-17T03:50:57.187Z","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":"primary"},{"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":"2026-11-02T14:07:00.549994Z"}]}}