Deviceways

Network switch

ZyXEL GS1900-48HP

Contribute

Projects for this device

Replacement firmware

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

HardwareA1

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.
Open device guideopenwrt.org
Original project github.com
First installation
GUI generic; U-Boot TFTP + serial recovery
Sources

Features & details

Check the project and hardware shown for each feature.

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
A1

OpenWrt · A1

OpenWrt · A1 — Source documentation (openwrt.org)

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

Hardware details

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)

GS1900-48HPv2 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(ABTQ.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 — GS1900-48HPv2 firmware (zyxel.com) ↗
Check more security advisories for this device · CVE.org