{"id":"CVE-2021-25435","aliases":["EUVD-2021-12331","GHSA-qgcm-6r7q-m4wm"],"status":"published","title":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021...","description":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01675,"percentile":0.77168,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2021-07-08T13:46:59Z","modified":"2026-06-17T03:42:04Z","products":[{"vendor":"linux","product":"tizen"},{"vendor":"samsung mobile","product":"tizen wearable devices"}],"references":[{"url":"https://security.samsungmobile.com/serviceWeb.smsb?year=2021\u0026month=7","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25435"},{"url":"https://github.com/advisories/GHSA-qgcm-6r7q-m4wm"}],"sources":{"cve":[{"id":"CVE-2021-25435","description":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.","status":"published","published":"2021-07-08T13:46:59Z","modified":"2024-08-03T20:03:05.748Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12331","description":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.","status":"published","published":"2021-07-08T13:46:59Z","modified":"2024-08-03T20:03:05Z","updated_at":"2026-11-03T03:24:53.302862Z"}],"ghsa":[{"id":"GHSA-qgcm-6r7q-m4wm","title":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021...","description":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.","status":"published","published":"2022-05-24T19:07:15Z","modified":"2023-01-30T05:00:39Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:46:14.926249Z"}],"nvd":[{"id":"CVE-2021-25435","description":"Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.","status":"published","published":"2021-07-08T14:15:08.72Z","modified":"2026-06-17T03:42:04.79Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:55.259633Z"}]}}