CVE-2026-7273 — Zyxel / GS1900-48HPv2 firmware

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Zyxel / GS1900-48HPv2 firmware	affected <= 2.90(ABTQ.1)C0
Zyxel / GS1900-8 firmware	affected <= 2.90(AAHH.1)C0
Zyxel / GS1900-8HP firmware	affected <= 2.90(AAHI.1)C0
Zyxel / GS1900-10HP firmware	affected <= 2.90(AAZI.1)C0
Zyxel / GS1900-16 firmware	affected <= 2.90(AAHJ.1)C0
Zyxel / GS1900-24 firmware	affected <= 2.90(AAHL.1)C0
Zyxel / GS1900-24E firmware	affected <= 2.90(AAHK.1)C0
Zyxel / GS1900-24EP firmware	affected <= 2.90(ABTO.1)C0
Zyxel / GS1900-24HPv2 firmware	affected <= 2.90(ABTP.1)C0
Zyxel / GS1900-48 firmware	affected <= 2.90(AAHN.1)C0

CWE

CWE-121

References

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

ADP enrichment

CISA-ADP

No English description supplied.