# CVE-2026-7273: Zyxel GS1900 switches can be taken over from the local network

Status: Being used now (CISA KEV, added 2026-09-21)
Who: Offices and homes with a Zyxel GS1900 series network switch.
Do this: Apply Zyxel's firmware update for your GS1900 switch.

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Zyxel GS1900 Series Switches (CVE-2026-7273) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-7273. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

## Sources
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026
- https://nvd.nist.gov/vuln/detail/CVE-2026-7273
- https://nvd.nist.gov/vuln/detail/CVE-2026-7273

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.