CVE-2025-8820
Estado: AnalizadaAlta (7.4)—
A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This vulnerability affects the function wirelessBasic of the file /goform/wirelessBasic. The manipulation of the argument submit_SSID1 leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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:P/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: 7.4
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.00%
- Percentil entre todas las CVEs puntuadas: 62
- 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 movement80 % - Impacto principal
T1059Command and Scripting Interpreterexecution75 % - Impacto secundario
T1068Exploitation for Privilege Escalationprivilege escalation70 %
Buffer overflow en función remota accesible con PR:L (red con privilegios); permite ejecución de código y escalada de privilegios en firmware Linksys.
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 (6)
CWE
- CWE-119, CWE-121
Referencias
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md#poc
- https://vuldb.com/?ctiid.319354
- https://vuldb.com/?id.319354
- https://vuldb.com/?submit.626684
- https://www.linksys.com/
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md
- https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md#poc
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-8820",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-8820",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-08-12T14:14:53.876422Z"
}
}
],
"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
}
],
"cvssMetricV40": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"cvssData": {
"Safety": "NOT_DEFINED",
"version": "4.0",
"Recovery": "NOT_DEFINED",
"baseScore": 7.4,
"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:P/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": "PROOF_OF_CONCEPT",
"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": "Linksys",
"product": "RE6250",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
},
{
"vendor": "Linksys",
"product": "RE6300",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
},
{
"vendor": "Linksys",
"product": "RE6350",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
},
{
"vendor": "Linksys",
"product": "RE6500",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
},
{
"vendor": "Linksys",
"product": "RE7000",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
},
{
"vendor": "Linksys",
"product": "RE9000",
"versions": [
{
"status": "affected",
"version": "20250801"
}
]
}
]
}
],
"published": "2025-08-11T00:15:25.607",
"references": [
{
"url": "https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "cna@vuldb.com"
},
{
"url": "https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md#poc",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?ctiid.319354",
"tags": [
"Permissions Required",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?id.319354",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/?submit.626684",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cna@vuldb.com"
},
{
"url": "https://www.linksys.com/",
"tags": [
"Product"
],
"source": "cna@vuldb.com"
},
{
"url": "https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
},
{
"url": "https://github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md#poc",
"tags": [
"Exploit",
"Third Party Advisory"
],
"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-121"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This vulnerability affects the function wirelessBasic of the file /goform/wirelessBasic. The manipulation of the argument submit_SSID1 leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "es",
"value": "Se detectó una vulnerabilidad en los Linksys RE6250, RE6300, RE6350, RE6500, RE7000 y RE9000 hasta 20250801. Esta vulnerabilidad afecta a la función wirelessBasic del archivo /goform/wirelessBasic. La manipulación del argumento submit_SSID1 provoca un desbordamiento del búfer basado en la pila. El ataque puede iniciarse en remoto. Se ha hecho público el exploit y puede que sea utilizado. Se contactó al proveedor con antelación para informarle sobre esta divulgación, pero no respondió."
}
],
"lastModified": "2026-06-17T10:07:42.683",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re6250_firmware:1.0.04.001:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "70728D67-153A-49FA-80E2-0DE9086DA253"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re6250:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "898FD49F-4225-47FF-822C-9E4FFB5EE192"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re6300_firmware:1.2.07.001:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1E3A6A93-D598-4F52-808C-EAA45B468066"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re6300:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "25647318-6422-418C-99B8-C806FF490028"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re6350_firmware:1.0.04.001:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0E0A8CCC-BD94-4865-9C0C-B60BD375CDC8"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re6350:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "4FFD3F65-E520-415D-BAB8-57FACEA5BEC7"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re7000_firmware:1.1.05.003:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8DC2325A-068F-4B5E-A365-6BF1103E320E"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re7000:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "D04E83B6-EE99-42EB-AA37-895B1467CEDA"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re9000_firmware:1.0.04.002:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "11F24125-412F-473A-BF34-02284F8DAC2D"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re9000:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "7424D2C2-BCF4-4B2D-BE59-71B50B13FE77"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linksys:re6500_firmware:1.0.013.001:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "92354C9C-D1B2-4143-803D-DE5EF7842184"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:h:linksys:re6500:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "52622B22-2E42-443B-81DA-7C42ECCF0564"
}
],
"operator": "OR"
}
],
"operator": "AND"
}
],
"sourceIdentifier": "cna@vuldb.com"
}