{"id":"CVE-2021-1861","aliases":["EUVD-2021-7325","GHSA-mwpq-gg3q-w4qr"],"status":"published","title":"An issue existed in determining cache occupancy. The issue was addressed through improved logic....","description":"An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00868,"percentile":0.59212,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-668"],"published":"2021-09-08T14:46:11Z","modified":"2026-06-17T03:32:40Z","products":[{"vendor":"apple","product":"macos"}],"references":[{"url":"https://support.apple.com/en-us/HT212325","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1861"},{"url":"https://github.com/advisories/GHSA-mwpq-gg3q-w4qr"}],"sources":{"cve":[{"id":"CVE-2021-1861","description":"An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.","status":"published","published":"2021-09-08T14:46:11Z","modified":"2024-08-03T16:25:05.646Z","updated_at":"2026-11-02T14:33:08.409321Z"}],"euvd":[{"id":"EUVD-2021-7325","description":"An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.","status":"published","published":"2021-09-08T14:46:11Z","modified":"2024-08-03T16:25:05Z","updated_at":"2026-11-03T03:25:14.678157Z"}],"ghsa":[{"id":"GHSA-mwpq-gg3q-w4qr","title":"An issue existed in determining cache occupancy. The issue was addressed through improved logic....","description":"An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.","status":"published","published":"2022-05-24T19:13:33Z","modified":"2023-01-27T05:03:05Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:42:10.172069Z"}],"nvd":[{"id":"CVE-2021-1861","description":"An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.","status":"published","published":"2021-09-08T15:15:11.663Z","modified":"2026-06-17T03:32:40.95Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}