{"id":"CVE-2021-40834","aliases":["EUVD-2021-27991","GHSA-39jf-9gqp-rjmj"],"status":"published","title":"User interface Spoofing in F-Secure SAFE browser for Android","description":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00751,"percentile":0.55481,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1021"],"published":"2021-12-10T13:38:46Z","modified":"2026-06-17T04:07:30Z","products":[{"vendor":"f-secure","product":"f-secure mobile security"},{"vendor":"f-secure","product":"safe"}],"references":[{"url":"https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40834"},{"url":"https://github.com/advisories/GHSA-39jf-9gqp-rjmj"}],"sources":{"cve":[{"id":"CVE-2021-40834","title":"User interface Spoofing in F-Secure SAFE browser for Android","description":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.","status":"published","published":"2021-12-10T13:38:46Z","modified":"2024-08-04T02:51:07.506Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2021-27991","description":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.","status":"published","published":"2021-12-10T13:38:46Z","modified":"2024-08-04T02:51:07Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T03:24:19.692229Z"}],"ghsa":[{"id":"GHSA-39jf-9gqp-rjmj","title":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When...","description":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.","status":"published","published":"2021-12-11T00:00:44Z","modified":"2023-02-01T05:07:01Z","cwes":["CWE-1021"],"updated_at":"2026-11-02T14:50:27.906349Z"}],"nvd":[{"id":"CVE-2021-40834","description":"A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.","status":"published","published":"2021-12-10T14:15:10.093Z","modified":"2026-06-17T04:07:30.46Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-1021"],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}