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    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 crafted HTTP request.

    Published:Jun 16, 2026
    Last Modified:Jun 18, 2026
    EPS:Jun 16, 2026
    EPSS Score:0.00277
    CVSS Score:8.8

    Affected Products

    Vendor
    Zyxel
    Product
    Gs1900-10hp Firmware
    Vendor
    Zyxel
    Product
    Gs1900-16 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-24 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-24e Firmware
    Vendor
    Zyxel
    Product
    Gs1900-24ep Firmware
    Vendor
    Zyxel
    Product
    Gs1900-24hpv2 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-48 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-48hpv2 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-8 Firmware
    Vendor
    Zyxel
    Product
    Gs1900-8hp Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2024-8882 (CVSS 4.5) — A buffer overflow vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version V2.80(AAHN.1…
    CVE-2024-8881 (CVSS 6.8) — A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmwar…
    CVE-2024-38270 (CVSS 5.3) — An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for…
    CVE-2023-35140 (CVSS 5.5) — The improper privilege management vulnerability in the Zyxel GS1900-24EP switch firmware version V2.70(ABTO.5)…
    CVE-2022-45853 (CVSS 6.7) — The privilege escalation vulnerability in the Zyxel GS1900-8 firmware version V2.70(AAHH.3) and the GS1900-8…
    CVE-2022-34746 (CVSS 5.9) — An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RS…
    CVE-2021-35032 (CVSS 6.4) — A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticat…
    CVE-2021-35031 (CVSS 6.8) — A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 serie…
    CVE-2021-35030 (CVSS 3.5) — A vulnerability was found in the CGI program in Zyxel GS1900-8 firmware version V2.60, that did not properly s…
    CVE-2019-15799 (CVSS 8.8) — An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created thr…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High