Deviceways

Network switch

ZyXEL GS1900-48

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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.
Hardware revision not specified
Get OpenWrt firmware Release listed · 25.12.6
Hardware revision not specified
Open hardware record
Original project github.com

Recorded configuration: 16 MB flash; 128 MB RAM

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

Features & details

Check the project and hardware shown for each feature.

OpenWrt

OpenWrt — 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

Hardware details

Technical references

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)

GS1900-48 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(AAHN.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 — GS1900-48 firmware (zyxel.com) ↗
CVE published

CVSS 6.8 (v3.1)

GS1900-48 firmware

A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1)C0 and earlier could allow an authenticated,…

CVE-2024-8881

Affected firmware
<= V2.80(AAHN.1)C0
Fix
Fix details in the linked record
Read Zyxel CVE record
Details and sources
CVE updated

A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1)C0 and earlier could allow an authenticated, LAN-based attacker with administrator privileges to execute some operating system (OS) commands on an affected device by sending a crafted HTTP request.

Security advisory zyxel security advisory for post authentication command injection and buffer overflow vulnerabilities in gs1900 series switches 11 12 2024 — GS1900-48 firmware (zyxel.com) ↗
CVE published

CVSS 4.5 (v3.1)

GS1900-48 firmware

A buffer overflow vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1)C0 and earlier could allow an authenticated, LAN-based attacker with…

CVE-2024-8882

Affected firmware
<= V2.80(AAHN.1)C0
Fix
Fix details in the linked record
Read Zyxel CVE record
Details and sources
CVE updated

A buffer overflow vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1)C0 and earlier could allow an authenticated, LAN-based attacker with administrator privileges to cause denial of service (DoS) conditions via a crafted URL.

Security advisory zyxel security advisory for post authentication command injection and buffer overflow vulnerabilities in gs1900 series switches 11 12 2024 — GS1900-48 firmware (zyxel.com) ↗
Check more security advisories for this device · CVE.org