Issues with built-in Wi-Fi and Guest VLAN after upgrading FLEX50W to firmware 5.41(ABAR.0)

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dpipro
dpipro Posts: 73 image  ZCNE Certified
First Comment Friend Collector Seventh Anniversary ZCNE Switch Level 1 Certification - 2020
in Security

Hi Folks,

After upgrading the firmware of a ZyXEL FLEX50W to version 5.41(ABAR.0), the built-in wireless has become unstable. Additionally, the guest wireless network, which is associated with VLAN 9 and has a configured DHCP pool, no longer assigns valid IP addresses to wireless clients.

Is there any patch or known fix available to resolve these issues?

Thanks in advance.

Best regards,

Best regards

All Replies

  • Zyxel_Tina
    Zyxel_Tina Posts: 699 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 100 Answers 500 Comments

    Hi @dpipro,

    The DF has sent to you, kindly check your private message. Thank you :)

    Zyxel Tina

  • Zyxel_Tina
    Zyxel_Tina Posts: 699 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 100 Answers 500 Comments

    Hi users,

    This issue has been addressed, and we will fix it in the next firmware release.

    Zyxel Tina

  • dpipro
    dpipro Posts: 73 image  ZCNE Certified
    First Comment Friend Collector Seventh Anniversary ZCNE Switch Level 1 Certification - 2020

    Hello Tina,

    issue solved with WK46 patch

    https://support.zyxel.eu/hc/en-us/articles/360005438274-Weekly-Firmware-Support-Version-Lab-Version

    Thank you

    Best regards
  • BCC
    BCC Posts: 13 image  Freshman Member
    First Comment Friend Collector Eighth Anniversary

    We have installed WK46 patch but users are now complaining about unusably slow Wi-Fi connection. Wi-Fi works now but slowness makes it unusable.

  • DeanH
    DeanH Posts: 51 image  Ally Member
    First Comment Fifth Anniversary

    Now that v5.42 ABAR0 is out, has anyone upgraded yet to see if this issue is fixed?

    Per the release notes:

    Modifications in V5.42(ABAR.0)C0 - 2026/01/22
    [On Premises mode]
    …
    10. [Bug Fix] eITS#251002189
    a. Fix: DHCP does not work for Built-in AP.

  • DeanH
    DeanH Posts: 51 image  Ally Member
    First Comment Fifth Anniversary

    Now that v5.42 ABAR0 is out, has anyone upgraded yet to see if this issue is fixed?

    Per the release notes:
    Modifications in V5.42(ABAR.0)C0 - 2026/01/22
    [On Premises mode]
    10. [Bug Fix] eITS#251002189
    a. Fix: DHCP does not work for Built-in AP.

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