{"id":"CVE-2021-1821","aliases":["EUVD-2021-7285","GHSA-p9hx-m56p-r6wc"],"status":"published","title":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6,...","description":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00658,"percentile":0.52013,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-10-28T18:16:59Z","modified":"2026-06-17T03:32:37Z","products":[{"vendor":"apple","product":"macos"},{"vendor":"apple","product":"watchos"}],"references":[{"url":"https://support.apple.com/en-us/HT212602","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/en-us/HT212605","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1821"},{"url":"https://github.com/advisories/GHSA-p9hx-m56p-r6wc"}],"sources":{"cve":[{"id":"CVE-2021-1821","description":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.","status":"published","published":"2021-10-28T18:16:59Z","modified":"2024-08-03T16:25:06.259Z","updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-7285","description":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.","status":"published","published":"2021-10-28T18:16:59Z","modified":"2024-08-03T16:25:06Z","updated_at":"2026-11-03T03:25:14.678157Z"}],"ghsa":[{"id":"GHSA-p9hx-m56p-r6wc","title":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6,...","description":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.","status":"published","published":"2022-05-24T19:19:02Z","modified":"2023-01-30T05:03:13Z","updated_at":"2026-11-02T14:46:47.501364Z"}],"nvd":[{"id":"CVE-2021-1821","description":"A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.","status":"published","published":"2021-10-28T19:15:08.667Z","modified":"2026-06-17T03:32:37.223Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:07:00.549994Z"}]}}