CVE-2026-21063

CVE-2026-210613 is a Samsung AppLock vulnerability allowing a bypass of the app lock feature through an exported component. If an attacker gains physical access to an unlocked device — even briefly — they can launch any protected app without authentication. The lock you configured across your banking app, photos, and messages fails all at once, giving the attacker access to your entire protected application cluster. This isn't a remote exploitation vector. The physical access requirement is the defining constraint, but treat it as a scope limitation on the initial intrusion vector, not a mitigating factor for severity. Physical access attacks are common in real-world scenarios: devices left unlocked at coffee shops, bars, workplaces, or stolen while recently used. If someone already has partial device access, this CVE provides the pivot to escalate to your most sensitive applications. The CVSS base score reflects technical accuracy while potentially understating the practical risk for users who depend on AppLock for privacy. The vulnerability exists because Samsung's AppLock implements a feature Android's architecture fundamentally resists: observing and intercepting app launches system-wide from a non-system app. This creates pressure to export components that should remain private — a structural failure mode that has repeated across multiple OEM security overlays over the past decade. Samsung's security resources have shifted toward Knox and Secure Folder, and AppLock appears to carry significant legacy debt: an exported component likely baked into older Android versions, maintained minimally but never security-reviewed against current platform semantics. For defenders: if your organization deploys Samsung devices with AppLock enabled, treat this as a high-priority remediation despite the medium CVSS. The compound blast radius — single bypass, multiple protected apps exposed — means the practical impact exceeds what the score suggests. Patch immediately. If Samsung's AppLock cannot be updated, consider whether your threat model can tolerate the risk, or whether users should migrate to native Android Work Profile solutions — though note those solve different problems and won't replicate the specific 'app-by-app lock' functionality. For Samsung device users: this vulnerability should push you to evaluate whether AppLock's protection guarantees are worth the attack surface it introduces. The feature persists in the firmware but may no longer receive active security investment.

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