{"id":"CVE-2021-30977","aliases":["EUVD-2021-17894"],"status":"published","description":"A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. 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":"2026-11-10","score":0.0151,"percentile":0.74658,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-08-24T18:51:16Z","modified":"2026-06-17T03:51:15Z","products":[{"vendor":"apple","product":"mac_os_x"},{"vendor":"apple","product":"macos"}],"references":[{"url":"https://support.apple.com/en-us/HT212978","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212979","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212981","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/kb/HT213183","tags":["x_refsource_CONFIRM","x_transferred"]}],"sources":{"cve":[{"id":"CVE-2021-30977","description":"A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:51:16Z","modified":"2024-08-03T22:48:14.247Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17894","description":"A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:51:16Z","modified":"2024-08-03T22:48:14Z","updated_at":"2026-11-03T03:24:40.11662Z"}],"nvd":[{"id":"CVE-2021-30977","description":"A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T19:15:23.253Z","modified":"2026-06-17T03:51:15.027Z","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"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}