CVE-2026-7273: Stack-based Buffer Overflow

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90ABTQ.1C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request...

CVE-2026-49195: Missing Authentication for Critical Function

Unauthenticated Debug Service. The /sbin/mtkdut binary is exposed on TCP port 9000 without authentication, allowing any LAN-based attacker to execute arbitrary UCC commands...

CVE-2024-38270: Insufficient Entropy

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80AAZI.0C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid...

CVE-2023-34141: Improper Neutralization of Special Elements used in an OS Command

A command injection vulnerability in the access point AP management feature of the Zyxel ATP series firmware versions 5.00 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50W series firmware versions 5.00 through 5.36 Patch 2, USG20W-VPN series firmware...

CVE-2023-34139: Improper Neutralization of Special Elements used in an OS Command

A command injection vulnerability in the Free Time WiFi hotspot feature of the Zyxel USG FLEX series firmware versions 4.50 through 5.36 Patch 2 and VPN series firmware versions 4.20 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affecte...