Samsung Galaxy S23 series gets August 2026 security update

TL;DR

Samsung has started rolling out the latest security update for the Galaxy S23, S23+, and S23 Ultra in South Korea.

The update is firmware S91xNKSS8FZH2, about 390MB, and includes the August 2026 security patch plus possible bug fixes and stability improvements.

It may reach other countries later today or later this week.

Samsung has finally released the latest security update for the Galaxy S23 series. The new update comes on the last day of this month, as the company has been lagging in rolling out new updates over the past couple of months.

The new software update for the Galaxy S23, Galaxy S23+, and the Galaxy S23 Ultra, which is currently available in South Korea, comes with firmware version S91xNKSS8FZH2. The update size is around 390MB and differs slightly for each model in the Galaxy S23 lineup.

It includes the August 2026 security patch but may also include other bug fixes and stability and reliability improvements.

Samsung Galaxy S26 Plus Ultra August 2026 Security Patch South Korea

Samsung Community

August 2026 security update on the Galaxy S23+ (left) and the Galaxy S23 Ultra (right) in South Korea

If you have a Galaxy S23 series phone and live in Korea, you can check for the new update and install it by opening the Settings app on your phone and navigating to Software update and tapping the Check for updates button. If the update is available, it starts downloading.

Once the update file is fully downloaded, tap the Restart button to complete the installation process. Your phone will restart after a few minutes.

Since the update has been released in South Korea, it could be released in other countries later today or sometime later this week.

Asif Iqbal Shaik - Senior Editor

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First Samsung device: T100

Asif is a computer engineer turned technology journalist. He has been using Samsung phones since 2004, and his current smartphone is the Galaxy S23 Ultra. He loves headphones, mechanical keyboards, and PC hardware. When not writing about technology, he likes watching crime and science fiction movies and TV shows.

Firmware Phone August 2026 Security Patch Galaxy S23 Galaxy S23 Plus Galaxy S23 Ultra South Korea

Galaxy S23 series gets the latest security update on the last day of the month

TL;DR

Asif Iqbal Shaik - Senior Editor