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How the CVE Works:
CVE-2025-21005 exploits improper access control in the `isemtelephony` component of Android versions prior to Android 15. A local attacker can leverage this flaw to bypass permission checks and access sensitive telephony-related data, such as call logs, SIM card details, or device identifiers. The vulnerability arises due to insufficient validation of caller identity within privileged system services, allowing unauthorized apps or users to execute restricted operations.
DailyCVE Form:
Platform: Android
Version: <15
Vulnerability: Improper Access Control
Severity: Critical
Date: 07/15/2025
Prediction: Patch expected by 08/30/2025
What Undercode Say:
Analytics:
adb shell dumpsys isemtelephony grep -r "android.permission.READ_PRIVILEGED_PHONE_STATE" /system/framework logcat | grep "isemtelephony_access_denied"
How Exploit:
- Local app requests telephony data without permissions.
- Exploits misconfigured `Binder` interface in
isemtelephony. - Bypasses `checkCallingOrSelfPermission()` checks.
Protection from this CVE:
- Apply vendor patches (post-August 2025).
- Restrict `isemtelephony` service access via SELinux.
- Monitor `READ_PRIVILEGED_PHONE_STATE` usage.
Impact:
- Unauthorized access to sensitive telephony data.
- Potential IMEI/SIM card details leakage.
- Privilege escalation vector.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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