Zywall USG FLEX Series & ATP Series - V5.41Patch 0 Firmware Release

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Zyxel_Melen
Zyxel_Melen Posts: 4,112 image  Zyxel Employee
Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
edited October 20 in Security Gateway New Release

Zywall USG FLEX Series & ATP Series Release Note 

October 2025

Firmware Version on all models

(Click the hyperlink to find the firmware file directly)

/tr>
FLEX SeriesDownload linkATP SeriesDownload link
FLEX50V5.41(ABAQ.0)C0ATP100V5.41(ABPS.0)C0
FLEX50WV5.41(ABAR.0)C0ATP100WV5.41(ABRW.0)C0
FLEX50AXV5.41(ACGB.0)C0ATP200V5.41(ABFW.0)C0
FLEX100V5.41(ABUH.0)C0ATP500V5.41(ABFU.0)C0
FLEX100WV5.41(ABWC.0)C0ATP700V5.41(ABTJ.0)C0
FLEX100AXV5.41(ACFN.0)C0ATP800V5.41(ABIQ.0)C0
FLEX200V5.41(ABUI.0)C0
FLEX500V5.41(ABUJ.0)C0
FLEX700V5.41(ABWD.0)C0

New Feature and Enhancements

S=Standalone mode, C=Cloud mode

New Feature and EnhancementsSC
1. [eITS#250501344] Improved user experience in Security Best Practices flow.V-

Bug Fix

S=Standalone mode, C=Cloud mode

Bug fixSC
1. eITS#241101556 a. Fix: Edit single-AP configuration. The configuration dialog will keep spinning and cannot load.V-
2. eITS#250302438 a. Fix: DNS thread filter function caused clients is unable to get DNS reply from Internet.V-
3. eITS#250401225 a. Fix: When session limit is enabled and client session is full, the firewall will stop to use SNAT and forwards traffic to Internet.V-
4. eITS#250500239 a. Fix: Unable to preview Billing Profile while Hotspot Management license is still in the Grace Period.V-
5. eITS#250501605 a. Fix: Interface cannot be set to 0.0.0.0V-
6. eITS#250501816 a. Fix: VPN client establish VPN tunnel to firewall by "split tunnel", the configured IP subnet did not provision in VPN profile.V-
7. eITS#250600078 a. Fix: The ext-group-use AD queries are not working on the backup AD server because the firewall failed to send AD queries to the backup server.V-
8. eITS#250600445 a. Fix: AD authentication failure after firmware update to V5.40.V-
9. eITS#250601710 a. Fix: AP slot configuration not being in order will cause Device-HA synchronization to fail. Device-HA synchronization mechanism will ignore the ordering of AP slot configurations.V-
10. eITS#250700332 a. Fix: Billing User can't log in.V-
11. eITS#250700434 a. Fix: L2TP PPP connects to "StrongVPN" what will result firewall crash.V-
12. eITS#250700827 a. Fix: Managed APs disconnected from controller caused by an issue in the library code implementation.V-
13. eITS#250700834 a. Fix: Unexpected communication between VLANs.V-
14. eITS#250701461 a. Fix: Sandboxing causes the device to run out of memoryV-
15. eITS#250701974 a. Fix: CPU usage may show 99–100% due to an overflow that occurred during calculation, resulting in a display error.V-
16. eITS#250800600 a. Fix: zyshd timeout when query Device insight data.V-
17. eITS#250800640 a. Fix: External Black List can't update.V-
18. Common vulnerabilities and Exposures: ZLD5.41 Patch0 is no longer vulnerable to the following CVE References: ⚫ CVE-2025-8078 ⚫ CVE-2025-9133VV

Please refer to the Download Link for more details.

Zyxel Melen


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