An urgent security alert has been issued for Android users, warning them of a critical vulnerability that could compromise their device’s lock screen security. The flaw, identified by the Donjon security team, could potentially expose sensitive data stored on the device to cybercriminals. What is particularly concerning is the swiftness with which the exploit can be executed, with malicious actors capable of bypassing security measures in less than a minute.
The vulnerability, known as CVE-2026-20435, specifically impacts Android devices powered by MediaTek processors, which are commonly found in budget-friendly smartphones. Security experts have noted that the flaw enables attackers to extract encryption keys before the device fully boots up, circumventing security features like full-disk encryption and lock screen protections.
According to Malwarebytes, approximately one in four Android phones, mainly lower-priced models, are susceptible to this exploit due to their use of MediaTek SoCs with Trustonic’s TEE. Researchers demonstrated the vulnerability by connecting a vulnerable phone to a laptop via USB, showcasing how they could retrieve the device’s PIN, decrypt storage, and access sensitive information from software wallets.
To mitigate the risk posed by this security threat, users are advised to check their device’s processor information in the Settings menu and ensure that their phone receives the latest security updates promptly, especially if it runs on a MediaTek chip. While MediaTek has released a patch for the vulnerability, individual device manufacturers must distribute the update through software updates for effective protection.
It is crucial to emphasize that this attack requires physical access to the device. By keeping devices secure and up to date, users can significantly reduce the likelihood of falling victim to such exploits. However, users with older devices that no longer receive updates should exercise caution or consider upgrading to a more secure device to protect their data effectively.