CVE-2025-4496
Estado: AnalizadaAlta (8.7)—
A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Puntuación base: 8.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.23%
- Percentil entre todas las CVEs puntuadas: 68
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement85 % - Impacto principal
T1059Command and Scripting Interpreterexecution80 %
Buffer overflow en CGI accesible remotamente con PR:L (acceso remoto con privilegios) → T1210. Overflow típicamente permite ejecución de código → T1059.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (7)
CWE
- CWE-119, CWE-120
- CWE-120
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-4496",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-4496",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-05-12T19:30:52.980508Z"
}
}
],
"cvssMetricV2": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"cvssData": {
"version": "2.0",
"baseScore": 9,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
"authentication": "SINGLE",
"integrityImpact": "COMPLETE",
"accessComplexity": "LOW",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "COMPLETE"
},
"acInsufInfo": false,
"impactScore": 10,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
],
"cvssMetricV40": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"cvssData": {
"Safety": "NOT_DEFINED",
"version": "4.0",
"Recovery": "NOT_DEFINED",
"baseScore": 8.7,
"Automatable": "NOT_DEFINED",
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"exploitMaturity": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"subIntegrityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"availabilityRequirement": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"subConfidentialityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED"
}
}
]
},
"affected": [
{
"source": "cna@vuldb.com",
"affectedData": [
{
"vendor": "TOTOLINK",
"product": "T10",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "A3100R",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "A950RG",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "A800R",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "N600R",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "A3000RU",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
},
{
"vendor": "TOTOLINK",
"product": "A810R",
"versions": [
{
"status": "affected",
"version": "4.1.8cu.5241_B20210927"
}
]
}
]
}
],
"published": "2025-05-10T05:15:50.610",
"references": [
{
"url": "https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md",
"tags": [
"Broken Link"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?ctiid.308212",
"tags": [
"Permissions Required",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?id.308212",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?submit.567081",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://www.totolink.net/",
"tags": [
"Product"
],
"source": "cna@vuldb.com"
},
{
"url": "https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md",
"tags": [
"Broken Link"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"description": [
{
"lang": "en",
"value": "CWE-119"
},
{
"lang": "en",
"value": "CWE-120"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-120"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad en TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU y A810R 4.1.8cu.5241_B20210927. Se ha declarado crítica. Esta vulnerabilidad afecta a la función CloudACMunualUpdate del archivo /cgi-bin/cstecgi.cgi. La manipulación del argumento FileName provoca un desbordamiento del búfer. El ataque puede ejecutarse en remoto. Se ha hecho público el exploit y puede que sea utilizado."
}
],
"lastModified": "2026-06-17T09:33:22.937",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:a3000ru_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0C2C419B-71C4-4BCF-9DE0-5E36762BBD19"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:a3000ru:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "FD355C8B-CA00-4093-BB2A-D3EC6EC64053"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:a810r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "87CBD69F-1FE2-4C7E-8FD4-82033307BA83"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:a810r:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "34981911-5839-430B-8008-EACFDFCEA2A1"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3FC2AB37-8F2B-4A5E-A806-FBEDDBDB584B"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:t10:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "1C410805-E3D4-4F8C-8DF4-013ACE3937FA"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:a3100r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E148D113-46E3-460C-8D38-F91B0310BBA3"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:a3100r:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "40729E79-9D89-440F-B38D-E62D310E27F9"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:a950rg_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9EF1A07E-3889-4C43-9D33-FE8770505F01"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:a950rg:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "2F20C691-11F3-4882-89C7-500C097C0938"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:a800r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DDBD5FF5-ED69-4B6B-9528-71BC71B20CF4"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:a800r:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "EA5FEC23-3370-4C1F-96C1-C1287FCCB07B"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:totolink:n600r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0FEF3E77-7C43-4561-93D4-DF20567B62DC"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:totolink:n600r:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "601C2FBE-B584-40B9-BBD7-7BF2A14CA694"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cna@vuldb.com"
}