PatchSiren cyber security CVE debrief
CVE-2025-68711 AppLockZ CVE debrief
CVE-2025-68711 describes a local authentication bypass in AppLockZ App Lock and Fingerprint Lock (package: applock.passwordfingerprint.applockz) version 4.2.11 for Android. The vulnerability stems from an insecure implementation where the PIN lock is rendered as a UI overlay rather than leveraging Android's secure authentication APIs. A local attacker with physical device access can navigate through exposed interface flows—specifically via advertisement or browser intents—to circumvent lockscreen verification and gain access to protected applications such as Chrome. This results in information disclosure and privilege escalation within the context of the locked apps. The CVE was published on 2026-05-26 and is currently in 'Received' status per NVD. No CVSS score or severity rating has been assigned. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog.
- Vendor
- AppLockZ
- Product
- App Lock and Fingerprint Lock
- CVSS
- LOW 2.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-26
- Original CVE updated
- 2026-05-27
- Advisory published
- 2026-05-26
- Advisory updated
- 2026-05-27
Who should care
Organizations with bring-your-own-device (BYOD) or corporate-owned personally-enabled (COPE) Android deployments; mobile device management (MDM) administrators; security-conscious Android users relying on third-party app locking solutions; incident response teams investigating unauthorized access to protected mobile applications
Technical summary
The AppLockZ application implements its PIN lockscreen as a UI overlay (SYSTEM_ALERT_WINDOW or similar) rather than using Android's secure authentication frameworks such as BiometricPrompt, KeyguardManager, or device credential APIs. This architectural weakness allows an attacker with physical device access to bypass the lock by triggering specific intent flows—particularly through advertisement SDKs or browser intents—that navigate around the overlay without triggering authentication verification. The cascading interface flows expose routes that permit app control evasion, enabling access to protected applications and their data. This represents a fundamental design flaw in the application's security model, as overlay-based locks can be circumvented through task switching, accessibility services, or intent-based navigation that the overlay fails to intercept.
Defensive priority
medium
Recommended defensive actions
- Review and remove AppLockZ App Lock and Fingerprint Lock version 4.2.11 from managed Android devices pending vendor patch availability
- Implement application control policies to restrict installation of applications that do not use Android's secure authentication APIs for lockscreen functionality
- Audit Android devices for applications implementing authentication overlays rather than native secure APIs
- Apply principle of least privilege to application permissions, particularly for apps requesting overlay or system alert window permissions
- Monitor for unauthorized access attempts to protected applications on devices where AppLockZ is deployed
- Consider alternative application locking solutions that properly integrate with Android's BiometricPrompt or KeyguardManager APIs
Evidence notes
The vulnerability description indicates the lock mechanism is implemented as an overlay rather than using Android's secure authentication APIs. The attack vector requires physical access and involves navigation through cascading interface flows via advertisement or browser intents. Source references include a GitHub repository and the Google Play Store listing for the affected application.
Official resources
2026-05-26