{"id":"CVE-2021-30900","aliases":["EUVD-2021-17817"],"status":"published","title":"Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. 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":0.05204,"percentile":0.92599,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-787"],"published":"2021-08-24T18:50:04Z","modified":"2026-06-17T03:51:06Z","kev":{"date_added":"2023-03-30","due_date":"2023-04-20","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2023-03-30"},{"source":"kev","since":"2023-03-30"}],"products":[{"vendor":"apple","product":"ios and ipados"},{"vendor":"apple","product":"ios, ipados, and macos"},{"vendor":"apple","product":"ipados"},{"vendor":"apple","product":"iphone_os"},{"vendor":"apple","product":"macos"}],"references":[{"url":"https://support.apple.com/kb/HT212872","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212867","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212868","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900","tags":["government-resource","US Government Resource"]}],"sources":{"cve":[{"id":"CVE-2021-30900","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:50:04Z","modified":"2025-10-21T23:25:36.697Z","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":"adp"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17817","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:50:04Z","modified":"2025-10-21T23:25:36Z","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"}],"exploited_since":"2023-03-30","updated_at":"2026-11-02T20:31:25.901288Z"}],"kev":[{"id":"CVE-2021-30900","title":"Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability","description":"Apple GPU drivers, included in iOS, iPadOS, and macOS, contain an out-of-bounds write vulnerability that may allow a malicious application to execute code with kernel privileges.","cwes":["CWE-20","CWE-787"],"kev":{"date_added":"2023-03-30","due_date":"2023-04-20","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2021-30900","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T19:15:18.083Z","modified":"2026-06-17T03:51:06.18Z","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":"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"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}