Buffer overflow in Zyxel Gs1900-10hp Firmware
CVE-2026-7273
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…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Gs1900-10hp Firmware — versions <= 2.90(AAZI.1)C0
- Zyxel Gs1900-16 Firmware — versions <= 2.90(AAHJ.1)C0
- Zyxel Gs1900-24e Firmware — versions <= 2.90(AAHK.1)C0
- Zyxel Gs1900-24ep Firmware — versions <= 2.90(ABTO.1)C0
- Zyxel Gs1900-24 Firmware — versions <= 2.90(AAHL.1)C0
- Zyxel Gs1900-24hpv2 Firmware — versions <= 2.90(ABTP.1)C0
- Zyxel Gs1900-48 Firmware — versions <= 2.90(AAHN.1)C0
- Zyxel Gs1900-48hpv2 Firmware — versions <= 2.90(ABTQ.1)C0
- Zyxel Gs1900-8 Firmware — versions <= 2.90(AAHH.1)C0
- Zyxel Gs1900-8hp Firmware — versions <= 2.90(AAHI.1)C0
Weakness classification (CWE)
References
- security@zyxel.com.tw (vendor-advisory)
Frequently asked questions
- What is CVE-2026-7273?
- CVE-2026-7273 is a high-severity vulnerability in Zyxel Gs1900-10hp Firmware, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-06-16.
- How severe is CVE-2026-7273?
- High severity. CVSS v3 base score is 8.8 out of 10.