{"id":"CVE-2021-39635","aliases":["1731024","A-206492634","ASB-A-206492634","EUVD-2021-25992","GHSA-xv84-3fv6-rp2r"],"status":"published","title":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices?But it does not verify...","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices，But it does not verify the caller's permissions，so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.Product: AndroidVersions: Android SoCAndroid ID: A-206492634","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.005,"percentile":0.43171,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-276"],"published":"2022-02-01T00:00:00Z","modified":"2026-11-04T16:48:29Z","fixes":[{"ecosystem":"Android","package":":unknown:","fixed_in":["SoCVersion:2022-02-05"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Android","package":":unknown:","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"SoCVersion:0"},{"fixed":"SoCVersion:2022-02-05"}]}],"versions":["SoCVersion"]}],"products":[{"vendor":"google","product":"android"}],"references":[{"url":"https://source.android.com/security/bulletin/2022-02-01","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39635"},{"url":"https://github.com/advisories/GHSA-xv84-3fv6-rp2r"}],"sources":{"cve":[{"id":"CVE-2021-39635","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices，But it does not verify the caller's permissions，so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.Product: AndroidVersions: Android SoCAndroid ID: A-206492634","status":"published","published":"2022-02-11T17:40:46Z","modified":"2024-08-04T02:13:37.663Z","updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-25992","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices，But it does not verify the caller's permissions，so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.Product: AndroidVersions: Android SoCAndroid ID: A-206492634","status":"published","published":"2022-02-11T17:40:46Z","modified":"2024-08-04T02:13:37Z","updated_at":"2026-11-03T03:24:22.709283Z"}],"ghsa":[{"id":"GHSA-xv84-3fv6-rp2r","title":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices?But it does not verify...","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices?But it does not verify the caller's permissions?so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.Product: AndroidVersions: Android SoCAndroid ID: A-206492634","status":"published","published":"2022-02-12T00:00:44Z","modified":"2023-02-03T05:05:51Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:53:48.348375Z"}],"nvd":[{"id":"CVE-2021-39635","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices，But it does not verify the caller's permissions，so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.Product: AndroidVersions: Android SoCAndroid ID: A-206492634","status":"published","published":"2022-02-11T18:15:10.02Z","modified":"2026-06-17T04:03:55.157Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"2.0","score":9.4,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:07:04.6896Z"}],"osv":[{"id":"ASB-A-206492634","description":"ims_ex is a vendor system service used to manage VoLTE in unisoc devices，But it does not verify the caller's permissions，so that normal apps (No phone permissions) can obtain some VoLTE sensitive information and manage VoLTE calls.","status":"published","published":"2022-02-01T00:00:00Z","modified":"2026-11-05T16:32:28.703711716Z","updated_at":"2026-11-05T17:55:14.774652Z"}]}}