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High · 8.8 Known exploited CVE-2026-7273 EUVD-2026-37030GHSA-rrv4-8jq5-8j78

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

Published Jun 16, 2026 · Updated Sep 22, 2026 · Assigned by Zyxel

Description

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 products

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

References