Samsung Galaxy A26 5G S266VUDS5BYK2
SM-S266V 2 countries Android 16

Samsung Galaxy A26 5G S266VUDS5BYK2 Firmware

Build Date:

Samsung Galaxy A26 5G S266VUDS5BYK2 is an Android 16 firmware for TFV, United States (TFN). It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build S266VUDU4BYI2: bootloader binary raised from 4 to 5, so after installing it there is no way back to older builds; security patch 2025-11-01 instead of 2025-09-01. A newer build for SM-S266V is available: S266VUDSACZH3.

OS updates guaranteed until: Android 21Security updates until: Mar 11, 2031
Download firmware
9.0 (43)547 times
Android 16
OS Version
2025-11-13
Build Date
2025-11-01
Security patch
2
Countries
2
CSC codes
5
Bootloader binary

Bootloader binary 5. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy A26 5G use bootloader binary A (10) (latest: S266VUDSACZH3). If your device already runs binary A (10), this build cannot be flashed.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.
    MODEM/CP Version: S266VUDS5BYK2
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S266V
    TFN United States
    TFV
    		S266VTFN5BYK2 2025-11-20 7.508 GiB
    SM-S266V_2_20251113163840_zcbct94mss_fac.zip
    		Download

    No matching downloads

    How to flash S266VUDS5BYK2

    • S266VUDS5BYK2 has bootloader binary 5. Your device must run binary 5 or lower: it is the 5th character from the end of your current build number.
    • CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
    • HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
    • The Download Mode key combo depends on the model: see all combos.
    Full flashing guide
    Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

    What's new in S266VUDS5BYK2

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Security patch: November 2025

    SMR Nov-2025 fixes 33 vulnerabilities, 2 of them critical. Android Security Bulletin: 24, Samsung Semiconductor: 5, Samsung-specific issues (SVE): 4.

    Most severe Samsung fixes:

    • high Out-of-bounds write in handling opcode in fingerprint trustlet (CVE-2025-21071)
    • high Out-of-bounds read in libimagecodec.quram.so (CVE-2025-21074)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-21075)

    All fixes and Galaxy models with this patch

    Rollout of S266VUDS5BYK2 by region

    Samsung released this build in all regions (2) on the same day, November 20, 2025.

    Frequently Asked Questions

    S266VUDS5BYK2 is Android 16 firmware for Samsung Galaxy A26 5G, released for TFV, United States (TFN). It includes the 2025-11-01 security patch. Samsung built it on 2025-11-13.

    SMR Nov-2025 fixes 33 vulnerabilities, 2 of them critical. Android Security Bulletin: 24, Samsung Semiconductor: 5, Samsung-specific issues (SVE): 4.

    No. A newer build for SM-S266V is available: S266VUDSACZH3. Install it instead of S266VUDS5BYK2 unless you need this exact version. The previous build was S266VUDU4BYI2.

    Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The download is 7.508 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy A26 5G must be on bootloader binary 5 or lower.

    This build uses bootloader binary 5. It can be flashed on a Samsung Galaxy A26 5G running binary 5 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". No other build of this model uses binary 5.

    Other builds and changelog for Samsung Galaxy A26 5G

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

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    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

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    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

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    • Security
    The device is protected with improved security.

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