Naturally, the November 2025 patch first arrived in Korea last week, but it's now started to reach users in the US and Europe, with other regions expected to follow soon.
In the US and Europe, the update is marked by firmware ending in CYK2 and weighs just over 450 MB – that's how you can spot it. To install it, users should do the following:
Open Settings
Go to Software update
Select Download and install
Have you received this update already?
Yes.
83.33%
No.
16.67%
What does it fix?
This is the first update for the Galaxy S24, S24+, and S24 Ultra since the rollout of One UI 8.0 based on Android 16. The November 2025 update is focused entirely on security. This patch addresses numerous vulnerabilities affecting Android and Samsung's One UI.
To be specific, the November 2025 security update tackles a total of 25 Android vulnerabilities. Two of these are considered critical, with one impacting devices running Android 13 and later, and the other limited to Android 16. The remaining issues are rated high-risk, and no medium- or low-level problems are addressed in this release.
Beyond Android itself, Samsung has patched nine security flaws found exclusively on Galaxy devices. The update also addresses 11 issues linked to the company's Exynos chips, which are used in both smartphones and wearable devices. Most Exynos models made between 2019 and 2024 appear to be affected.
To update or not to update?
Galaxy owners should go ahead and install the update. While it doesn't add new features, it strengthens your phone's defenses against serious security risks in both Android and Samsung's own software.
With critical and high-risk vulnerabilities addressed, plus fixes for Exynos chips, the patch helps protect sensitive data and keeps your device running safely. It's a quick step for peace of mind.
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Sebastian, a veteran of a tech writer with over 15 years of experience in media and marketing, blends his lifelong fascination with writing and technology to provide valuable insights into the realm of mobile devices. Embracing the evolution from PCs to smartphones, he harbors a special appreciation for the Google Pixel line due to their superior camera capabilities. Known for his engaging storytelling style, sprinkled with rich literary and film references, Sebastian critically explores the impact of technology on society, while also perpetually seeking out the next great tech deal, making him a distinct and relatable voice in the tech world.
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