Zywall USG FLEX Series & ATP Series - V5.40Patch 0 Firmware Release

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Zyxel_Melen Posts: 3,240  Zyxel Employee
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Zywall USG FLEX Series & ATP Series Release Note 

May 2025

Firmware Version on all models

(Click the hyperlink to find the firmware file directly)

/tr>
FLEX SeriesDownload linkATP SeriesDownload link
FLEX50V5.40(ABAQ.0)C0ATP100V5.40(ABPS.0)C0
FLEX50WV5.40(ABAR.0)C0ATP100WV5.40(ABRW.0)C0
FLEX50AXV5.40(ACGB.0)C0ATP200V5.40(ABFW.0)C0
FLEX100V5.40(ABUH.0)C0ATP500V5.40(ABFU.0)C0
FLEX100WV5.40(ABWC.0)C0ATP700V5.40(ABTJ.0)C0
FLEX100AXV5.40(ACFN.0)C0ATP800V5.40(ABIQ.0)C0
FLEX200V5.40(ABUI.0)C0
FLEX500V5.40(ABUJ.0)C0
FLEX700V5.40(ABWD.0)C0

New Feature and Enhancements

S=Standalone mode, C=Cloud mode

New Feature and EnhancementsSC
1. [eITS#240901862] Change the default value of Drop TCP SYN to 1 for better protection.V-
2. [eITS#241100728] Add the 'system-protect defaultport' ZySH command to support user-configured ports.V-
3. [eITS#241200805] Adjust abnormal tcp/udp traffic detected logs to debug level.V-
4. [eITS#241200902] Disable weak ciphers in the https/ssh protocol.V-
5. [eITS#250100793] Add i-note for base interface of PPPoE type.V-
6. [eITS#250200278] USG FLEX 700 support expiration and notification for local user account.V-
7. User Interface/Description change: a. Integration of the device’s local GUI pop-up warning into the Best Security Practices flow. b. Rename the signature page URL Threat Filter to 'DNS Threat Filter' and adjust the download message.V-
8. ZLD default IPSec VPN DH group change from DH2 to DH19.V-
9. AP Controller now supports the new WiFi 7 models: WBE530, WBE510D, and WBE630S.V-
10. Wireless Health has been enhanced to improve the user connection experience.V-
11. Japan 6GHz 320MHz bandwidth is now supported.V-
12. [eITS#221201339] Add the note: 'This device is managed by Nebula. Please use the Nebula-assigned password found in Site-wide > General settings > Device configuration' on the login Web-GUI in Nebula mode.-V
13. [eITS#241101116] DDNS password can't accept "."-V

Bug Fix

S=Standalone mode, C=Cloud mode

Bug fixSC
1.VV
2. Common vulnerabilities and Exposures: ZLD5.40 Patch0 is no longer vulnerable to the following CVE References: ⚫ CVE-2024-38476VV

Please refer to the Download Link for more details.

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