{
    "id": "CVE-2026-7273",
    "published": "2026-06-16 03:16:13",
    "last_modified": "2026-09-22 12:10:51",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-121",
    "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.",
    "epss_score": "0.02501",
    "epss_percentile": "0.84081",
    "kev": 1,
    "kev_due": "2026-09-24",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:18:03",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-09-24."
    },
    "products": [
        {
            "vendor": "zyxel",
            "product": "gs1900-10hp"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-10hp_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-16"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-16_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24e"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24e_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24ep"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24ep_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24hpv2"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-24hpv2_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-48"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-48_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-48hpv2"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-48hpv2_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-8"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-8_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-8hp"
        },
        {
            "vendor": "zyxel",
            "product": "gs1900-8hp_firmware"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2026-7273",
        "date_added": "2026-09-21",
        "due_date": "2026-09-24",
        "vendor": "Zyxel",
        "product": "GS1900 Series Switches",
        "name": "Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273",
        "https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation"
    ]
}