Samsung rolls out June 2025 security update for Galaxy S21, foldables and more

Samsung has officially begun the rollout of its latest security update for several flagship devices, chief among them being the Galaxy S21 series and a range of foldable models including the Galaxy Z Fold and Z Flip series. This June 2025 patch focuses primarily on fortifying system defenses by addressing vulnerabilities identified in previous software versions. Users can expect enhanced protection against common threats such as unauthorized access, malware, and potential exploits targeting the device firmware.

Key elements of the update include:

• Improved kernel security: Patches for elevation-of-privilege and denial-of-service vulnerabilities.
• Enhanced biometric authentication stability on foldable displays.
• System performance optimizations ensuring smoother multitasking capabilities, especially for flagship foldables.
• Security patches for third-party libraries integrated within Samsung’s custom UI.

These measures underscore Samsung’s commitment to maintaining device integrity and user privacy in an evolving cyber threat landscape. Owners of eligible devices are recommended to update promptly via Settings > Software Update to ensure they benefit from these critical improvements.

The latest firmware update from Samsung fortifies user devices by tackling an array of critical security flaws detected in previous versions. Of particular note is the patching of vulnerabilities related to remote code execution, which, if left unaddressed, could allow malicious actors to gain unauthorized control over affected devices. Additionally, the update resolves weaknesses in the kernel privilege escalation layer, significantly reducing the risk of attackers exploiting system-level access to compromise sensitive data.

Security enhancements also extend to Samsung’s proprietary applications and network protocols. Key fixes include:

• Bluetooth stability and encryption improvements to prevent unauthorized data interception or pairing exploits;
• Resolved issues within the Wi-Fi stack, mitigating exposure to potential man-in-the-middle attacks;
• Strengthened biometric authentication protections to safeguard fingerprint and facial recognition data from being bypassed;
• Addressed vulnerabilities in the system UI that prevented privilege misuse through crafted user inputs.

Before initiating the installation, ensure your device is adequately charged or connected to a power source to avoid interruptions. Begin by navigating to Settings > Software Update, where you’ll find the option to Download and Install the June security patch. It’s highly recommended to connect to a stable Wi-Fi network to expedite the download process and prevent excessive data usage. If your device does not prompt the update automatically, you can manually check by tapping on Download updates manually. Be patient, as the update package might take a few minutes depending on your connection speed.

Once the download completes, tap Install Now to begin the process. Your device will restart and apply the latest security improvements, so avoid interrupting the procedure. Post installation, verify that the update was successful by revisiting Settings > Software Update > Downloaded Updates; the June 2025 patch should be listed along with the latest build number. For enhanced security, consider checking your settings for any new permissions or features introduced with the update. Keeping your device current is critical to safeguarding data and ensuring optimal performance across your Galaxy S21, foldables, and other supported models.

After applying the latest Samsung security update, it’s crucial to reinforce your device’s defenses to maximize protection. Experts strongly advise users to verify all app permissions to ensure that no outdated or unnecessary access privileges remain active, potentially exposing sensitive data. Additionally, enabling features like biometric authentication and two-factor authentication (2FA) can add critical layers of security, thwarting unauthorized attempts even if your device falls into the wrong hands.

Regular maintenance should not be overlooked. Users should consider clearing app caches and performing routine backups to safeguard against any potential data loss linked to software glitches post-update. Staying informed about new vulnerabilities and patches via official Samsung channels or trusted tech news sources further empowers users to act swiftly, ensuring their Galaxy S21, Foldables, or other devices remain resilient in a constantly evolving digital landscape.