Samsung Begins January 2026 Security Rollout for Z Fold 7, Z Flip 7, S25 and TriFold
The update targets roughly 55 vulnerabilities, including a critical file‑access flaw confirmed in Samsung’s bulletin.
Overview
- The campaign is live in South Korea for recent flagships and will reach more regions in stages over the coming days.
- Foldable builds are F966NKSS7AYLT for the Galaxy Z Fold 7 and F766NKSS7AYLT for the Galaxy Z Flip 7, with the Galaxy Z TriFold on F968NKSS2AZA1.
- Galaxy S25 series devices are receiving stable builds identified by the BYLR suffix after earlier availability in the One UI 8.5 beta channel.
- About 55 fixes are included overall, with contributions from Google (23, two not applicable to Samsung devices), Samsung Mobile (30), and Samsung Semiconductor (4).
- Samsung’s S25 bulletin lists 21 device‑specific fixes with two marked critical and 19 high, and it explicitly addresses CVE‑2026‑20969 involving unauthorized file access with system privileges.