NebulaFlex Switch GS1915 Series - V4.70 Patch 5 Firmware Release

Zyxel_Melen

Zyxel Switch GS1915 Series Release Note 

November 2025

Firmware Version on all models

(Click Hyperlink to download the firmware directly)

Zyxel GS1915-8 - V4.70(ACAP.5)C0

Zyxel GS1915-8EP - V4.70(ACAQ.5)C0

Zyxel GS1915-24E - V4.70(ACDR.5)C0

Zyxel GS1915-24EP - V4.70(ACDS.5)C0

New Feature and Enhancements

1. [Nebula 19.10] Support Port advisor. 

2. [Nebula 19.20] VLAN ingress check enabled by default.

Bug Fix

C=Cloud mode, S=Standalone mode

Bug fix	C	S
1. [eITS#241100538] Fixed special characters (space, ' ," ) can be allowed in username to cause configuration error.	-	V
2. [eITS#241200595] Fixed high CPU usage triggered by client switching between trunk interfaces.	V	V
3. [eITS#250100026] Fixed abnormal crash issue when continuous queries OID 1.0.8802.1.1.2.1.5.4795.1.2.1.1 and its sub-OIDs.	V	V
4. [eITS#250100440] Fixed that truncated DNS packets cannot be processed causing DNS parsing failed.	V	V
5. [eITS#250200815, 250400367] After deleting original and creating another mgmt VLAN and IP, pinging the new mgmt IP over LACP links will fail if one of the LACP member ports is inactive.	V	V
6. [eITS#250302409] Fixed the device sometimes fail to connect with Nebula server.	V	-
7. [eITS#250500429] Fixed crash when receiving IPv6 tunnel packet. Bug fix Nebula Standalone	-	V
8. [eITS#250601084] Fixed hang when using CLI to show tech-support.	V	V
9. [eITS#250800443] Special characters in the port name cause the port information to appear blank on the Dashboard.	V	V

Please refer to the Download Link for more details.