CVE-2019-12583
Estado: ModificadaCrítica (9.1)—
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Puntuación base: 9.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 44%
- Percentil entre todas las CVEs puntuadas: 99
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (14)
Zyxel — Uag2100 FirmwareZyxel — Uag4100 FirmwareZyxel — Uag5100 FirmwareZyxel — Usg1100 FirmwareZyxel — Usg110 FirmwareZyxel — Usg1900 FirmwareZyxel — Usg210 FirmwareZyxel — Usg2200-vpn FirmwareZyxel — Usg310 FirmwareZyxel — Zywall 1100 FirmwareZyxel — Zywall 110 FirmwareZyxel — Zywall 310 FirmwareZyxel — Zywall Vpn100 FirmwareZyxel — Zywall Vpn300 Firmware
CWE
- CWE-425
Referencias
- https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
- https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
- https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
- https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
JSON original (NVD)
Mostrar
{
"id": "CVE-2019-12583",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.4,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 4.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 9.1,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 5.2,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2019-06-27T14:15:10.393",
"references": [
{
"url": "https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-425"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service."
},
{
"lang": "es",
"value": "El control de acceso que falta en el componente \"Tiempo libre\" de varios dispositivos Zyxel UAG, USG y ZyWall permite que un atacante remoto genere cuentas de invitado al acceder directamente al generador de cuentas. Esto puede llevar a un acceso no autorizado a la red o a una denegación de servicio."
}
],
"lastModified": "2026-06-17T02:14:54.653",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:uag2100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1ECFD77B-1D28-4980-B6BF-3044D73355E8",
"versionEndIncluding": "4.18\\(aaiz.1\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:uag2100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "AAEE8768-0E03-4CD1-8359-A43C561E0349"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:uag4100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A9D27376-0C62-44CD-8CA1-5C8B570C8232",
"versionEndIncluding": "4.18\\(aatd.1\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:uag4100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4B73627B-82A3-45C7-BEF0-39A703D5A91B"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:uag5100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7458A1BE-4324-423F-B78D-31BAB1B40565",
"versionEndIncluding": "4.18\\(aapn.1\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:uag5100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4680F0CF-486F-40D9-BE15-36E9E620DDB8"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg110_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E2AE7A03-A2F8-42BC-AB02-974391D7BDB3",
"versionEndIncluding": "4.33\\(aaph.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg110:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4834AC5E-884D-4A1C-A39B-B3F4A281E3CB"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg210_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8168138F-9867-4EAC-B5B7-D624B13FD16A",
"versionEndIncluding": "4.33\\(aapi.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg210:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "EAFF1122-755A-4531-AA2E-FD6E8478F92F"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg310_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D6922979-22DA-413C-B066-45C6342ECAEF",
"versionEndIncluding": "4.33\\(aapj.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg310:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "F302801D-3720-4598-8458-A8938BD6CB46"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg1100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D5E174E5-E76C-4415-911E-65AD07CFCBBD",
"versionEndIncluding": "4.33\\(aapk.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg1100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4B68C4BD-3279-47AB-AC2A-7555163B12E2"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg1900_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1A8F4182-5259-4A05-BFCF-A77482691794",
"versionEndIncluding": "4.33\\(aapl.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg1900:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "60F4E816-C4D3-451A-965C-45387D7DEB5B"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:usg2200-vpn_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "845ADB93-B13D-49AB-96AE-1663013B97FC",
"versionEndIncluding": "4.33\\(abae.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:usg2200-vpn:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "68CB2401-479A-4124-B03F-589D7C1061FF"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:zywall_vpn100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7D269DD7-A606-491A-BDC7-02049AC18C87",
"versionEndIncluding": "10.02\\(abfv.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:zywall_vpn100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "6762B13C-6FD5-49D7-B2D6-4986BAC3D425"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:zywall_vpn300_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8BEFC3AA-7927-4226-A0D1-B024F19D050E",
"versionEndIncluding": "10.02\\(abfc.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:zywall_vpn300:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "E7C35A94-304B-46FB-BAA0-4E0C4F34BEDD"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:zywall_110_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7ABACC81-93A0-45EA-BBF7-AA946B9D1DDB",
"versionEndIncluding": "4.33\\(aaaa.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:zywall_110:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "145E41D9-E376-4B8E-A34F-F2C7ECFD649D"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:zywall_310_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F5E119B7-A4CD-4CF1-945E-0F6FC3B2A625",
"versionEndIncluding": "4.33\\(aaab.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:zywall_310:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "B40C703E-C7C0-4B49-A336-83853D3E8C31"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:zyxel:zywall_1100_firmware:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C3AF9535-452F-4448-B60B-00AAE00AEAFF",
"versionEndIncluding": "4.33\\(aaac.0\\)c0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:zyxel:zywall_1100:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "BCE32A1C-A730-4893-BCB9-F753F8E65440"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cve@mitre.org"
}