Zyxel Switches (GS-series) Vulnerabilities & Security Advisories
2 advisories tracked · Zyxel Security Advisories via NVD · 1 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Zyxel advisory that VulniPulse classified as Switches (GS-series), with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 1 high, 1 medium.
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Zyxel Security Advisories via NVD
Zyxel runs its own CNA (security@zyxel.com.tw), but a large share of Zyxel CVEs are assigned by MITRE and third-party researchers — so VulniPulse ingests them from NVD by keyword (which covers more than the CNA feed alone), requiring a Zyxel product in the description, and links back to the zyxel.com security advisory when referenced. Covers the USG FLEX / ATP / VPN firewalls, Nebula-managed access points, the GS-series switches and the VMG/EMG gateways — an SMB fleet that is a chronic KEV / actively-exploited target.
Latest Zyxel Switches (GS-series) advisories
High [CVE-2026-7273] 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
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 named by the advisory: GS1900-8 firmware; GS1900-8HP firmware; GS1900-10HP firmware; GS1900-16 firmware; and 3 more. Affected products named by the advisory: GS1900-24 firmware; GS1900-24E firmware; GS1900-24EP firmware.
Medium [CVE-2026-4795] missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.