{"id":"CVE-2021-30787","aliases":["EUVD-2021-17704","GHSA-8558-rh5p-hjfm"],"status":"published","title":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5,...","description":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to cause unexpected system termination or write kernel memory.","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":0.01058,"percentile":0.64961,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-09-08T13:48:51Z","modified":"2026-06-17T03:50:53Z","products":[{"vendor":"apple","product":"mac_os_x"},{"vendor":"apple","product":"macos"},{"vendor":"apple","product":"security update - catalina"}],"references":[{"url":"https://support.apple.com/en-us/HT212602","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212600","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212603","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-30787"},{"url":"https://github.com/advisories/GHSA-8558-rh5p-hjfm"}],"sources":{"cve":[{"id":"CVE-2021-30787","description":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to cause unexpected system termination or write kernel memory.","status":"published","published":"2021-09-08T13:48:51Z","modified":"2024-08-03T22:40:32.176Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17704","description":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to cause unexpected system termination or write kernel memory.","status":"published","published":"2021-09-08T13:48:51Z","modified":"2024-08-03T22:40:32Z","updated_at":"2026-11-03T03:24:41.017854Z"}],"ghsa":[{"id":"GHSA-8558-rh5p-hjfm","title":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5,...","description":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to cause unexpected system termination or write kernel memory.","status":"published","published":"2022-05-24T19:13:42Z","modified":"2023-01-30T05:01:54Z","updated_at":"2026-11-02T14:46:30.744651Z"}],"nvd":[{"id":"CVE-2021-30787","description":"This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to cause unexpected system termination or write kernel memory.","status":"published","published":"2021-09-08T14:15:11.307Z","modified":"2026-06-17T03:50:53.807Z","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":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}