Deviceways

Network switch

ZyXEL GS1900-24HP

Contribute

Projects for this device

Replacement firmware

Replace router software with a customizable system for network controls and community packages.

How to get started

Follow the guide for your exact router version. The first installation may use its web interface, recovery mode or a serial connection.

Setup
Firmware replacement; route varies by router
You’ll need
Exact hardware revision, an appropriate OpenWrt release and its model-specific installation guide.
A1 · 64 MB memory
Memory: 64 MBGet OpenWrt firmware Release listed · 25.12.6
B1 · 128 MB memory
Memory: 128 MBGet OpenWrt firmware Release listed · 25.12.6
v1
Open hardware record
v2
Open hardware record
Original project github.com

A1 · 64 MB memory

First installation
GUI OEM; U-Boot TFTP + serial recovery

B1 · 128 MB memory

First installation
GUI OEM; U-Boot TFTP recovery
Sources

Features & details

Check the project and hardware shown for each feature.

Device details

zyxel gs1900-24hp v1 — device documentation (github.com)

Hardware revision
v1

Device details

zyxel gs1900-24hp v2 — device documentation (github.com)

Hardware revision
v2

Device details

Device details — v1 — Source documentation (openwrt.org)

Hardware revision
A1

OpenWrt · A1 · 64 MB memory

OpenWrt · A1 · 64 MB memory — v1 — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM, U-Boot TFTP + serial recovery
Recovery routes recorded
U-Boot TFTP + serial recovery
Availability recorded by source
Discontinued

Device details

Device details — v2 — Source documentation (openwrt.org)

Hardware revision
B1

OpenWrt · B1 · 128 MB memory

OpenWrt · B1 · 128 MB memory — v2 — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM, U-Boot TFTP recovery
Recovery routes recorded
U-Boot TFTP + serial recovery
Availability recorded by source
Available 2022

Hardware differences

Security

Saved scan

From our saved security research.

Model advisories

Selected highlights

Prioritized by known exploitation, severity, then date.

CVE published

Listed in CISA KEV ↗CVSS 8.8 (v3.1)

GS1900-24HPv2 firmware

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to…

CVE-2026-7273

Affected firmware
<= 2.90(ABTP.1)C0
Fix
Fix details in the linked record
Read Zyxel CVE record
Details and sources
CVE updated

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Security advisory zyxel security advisory for stack based buffer overflow vulnerability in gs1900 series switches 06 16 2026 — GS1900-24HPv2 firmware (zyxel.com) ↗
Check more security advisories for this device · CVE.org