CVE-2026-20233
Estado: AnalizadaMedia (6.1)—
A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.
This vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Puntuación base: 6.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- 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 (1)
CWE
- CWE-79
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-20233",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20233",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-03T17:46:57.004996Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 6.1,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "psirt@cisco.com",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Webex Meetings",
"versions": [
{
"status": "affected",
"version": "39.7.7"
},
{
"status": "affected",
"version": "39.9"
},
{
"status": "affected",
"version": "40.4.10"
},
{
"status": "affected",
"version": "39.6"
},
{
"status": "affected",
"version": "40.6.2"
},
{
"status": "affected",
"version": "39.8.2"
},
{
"status": "affected",
"version": "39.8.4"
},
{
"status": "affected",
"version": "40.1"
},
{
"status": "affected",
"version": "39.11"
},
{
"status": "affected",
"version": "39.7.4"
},
{
"status": "affected",
"version": "39.9.1"
},
{
"status": "affected",
"version": "40.4"
},
{
"status": "affected",
"version": "40.6"
},
{
"status": "affected",
"version": "39.7"
},
{
"status": "affected",
"version": "39.8"
},
{
"status": "affected",
"version": "39.8.3"
},
{
"status": "affected",
"version": "40.2"
},
{
"status": "affected",
"version": "39.10"
},
{
"status": "affected",
"version": "42.6"
},
{
"status": "affected",
"version": "42.7"
},
{
"status": "affected",
"version": "42.8"
},
{
"status": "affected",
"version": "42.9"
},
{
"status": "affected",
"version": "42.10"
},
{
"status": "affected",
"version": "42.11"
},
{
"status": "affected",
"version": "42.12"
},
{
"status": "affected",
"version": "43.1"
},
{
"status": "affected",
"version": "43.2"
},
{
"status": "affected",
"version": "43.3"
},
{
"status": "affected",
"version": "43.4"
},
{
"status": "affected",
"version": "43.4.1"
},
{
"status": "affected",
"version": "43.4.2"
},
{
"status": "affected",
"version": "43.5.0"
},
{
"status": "affected",
"version": "43.6.0"
},
{
"status": "affected",
"version": "43.6.1"
},
{
"status": "affected",
"version": "43.7"
},
{
"status": "affected",
"version": "43.8"
},
{
"status": "affected",
"version": "43.9"
},
{
"status": "affected",
"version": "43.10"
},
{
"status": "affected",
"version": "43.11"
},
{
"status": "affected",
"version": "43.12"
},
{
"status": "affected",
"version": "44.1"
},
{
"status": "affected",
"version": "44.2"
},
{
"status": "affected",
"version": "44.3"
},
{
"status": "affected",
"version": "44.4"
},
{
"status": "affected",
"version": "44.5"
},
{
"status": "affected",
"version": "44.6"
},
{
"status": "affected",
"version": "44.7"
},
{
"status": "affected",
"version": "44.8"
},
{
"status": "affected",
"version": "44.9"
},
{
"status": "affected",
"version": "44.10"
},
{
"status": "affected",
"version": "44.11"
},
{
"status": "affected",
"version": "44.12"
},
{
"status": "affected",
"version": "45.1"
},
{
"status": "affected",
"version": "45.2"
},
{
"status": "affected",
"version": "45.3"
},
{
"status": "affected",
"version": "45.4"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2026-06-03T18:16:20.320",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-jw3NeQzS",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-79"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.\r\n\r\nThis vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la interfaz de usuario basada en web de Cisco Webex Meetings podría haber permitido a un atacante remoto no autenticado realizar un ataque de cross-site scripting (XSS). Cisco ha abordado esta vulnerabilidad en el servicio Webex Meetings, y no se requiere ninguna acción por parte del cliente.\n\nEsta vulnerabilidad existía debido a una validación insuficiente de la entrada del usuario. Antes de que esta vulnerabilidad fuera abordada, un atacante podría haber explotado esta vulnerabilidad persuadiendo a un usuario para que siguiera un enlace malicioso. Un exploit exitoso podría haber permitido al atacante ejecutar código de script arbitrario en el navegador del usuario objetivo o acceder a información sensible basada en el navegador."
}
],
"lastModified": "2026-07-22T19:10:00.120",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3C10CCD2-17FB-4BBA-86E3-64228A2661E8"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "20608889-3684-4479-B028-C5E70F661591"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.7.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8A9F521F-5D30-4DE7-A308-D1EC7F17C5FB"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.7.7:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DA6A48E8-0B18-49F7-9869-A493F356778E"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2F86C0BC-0853-4935-B264-C6715AA3846C"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.8.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3875C388-7B83-451C-8F37-609A414B847E"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.8.3:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "17D2A6BB-43D5-4907-BA8E-0EFC5C45A8E4"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.8.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "43E36526-AD0B-4020-86B5-0681D6D4A845"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C5D6E81A-5CD3-4984-B9AA-31573DFA0CA9"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.9.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D1752401-15DE-42A1-B7A1-F6C82DAEE1A4"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C33925F4-3921-4FDD-AA6B-81061ED9A1BD"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:39.11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F9730F01-1612-46E6-9AA1-80B2D1D61BAF"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F5EB0ACC-4FFA-443B-AE45-757DBBE47579"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.2.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "ED5315D1-865A-47C9-9DFC-4F6A071C8D46"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2C43E965-3DD8-4904-B4B4-2CE504A1473D"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.4.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F82C6242-BCD3-43C1-8B1D-4044C4263050"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6578FEFD-CC4A-401A-B769-A3BB8998CBF1"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:40.6.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "11176259-0359-416D-A22D-DEBEBE755FE9"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1FEC5E67-DFEA-4654-ACDA-D3CF7B53B20B"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "64BEDE4E-B77D-4015-BB2A-B306322A33A1"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FEFBF53E-8537-4F7F-BB98-1B4FE4006251"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "20A92B49-3D95-4147-A854-CE1938A3C517"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9E56AB27-1D90-45A8-BF88-FEBC400B7607"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "978E3F35-1B46-4192-BF7B-DD262C060435"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:42.12.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EFFE4AF5-2AE9-4637-B0DB-AEF4208BC0F6"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "448FB82E-A686-494A-A258-9D1067D6EB6B"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.2.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2BB30686-198C-4C37-B54F-4B2A4C64BDBE"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.3.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D466BF87-5DA1-46C6-A218-765957C19E63"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4184DA56-1ABA-41EC-A4BB-897D3988E098"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.4.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "68570B19-32BB-441C-9C00-C1A839CBD985"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.4.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "55BD3A1F-9453-40EE-B155-8182BA49C1CB"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.5.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D0FE1DED-33FB-4118-80E7-86D4641C7E61"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "237B4813-72B7-4154-BAB7-4056CED952CB"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.6.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D60F5271-1496-490F-A7BF-CDEE5EFF2FE0"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "19F40E62-7E53-4BCA-85E8-598D9924BA67"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "49FA7256-0B5C-44D4-9CF8-D2F9363E5206"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E1B4085A-EBFF-4031-99F5-7B8ABD4E2695"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8D89BAFF-753C-422E-9683-179720FE07A0"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D447ABA0-F9DA-4C64-9AA4-0BCCABE05C51"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:43.12.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6C511595-CF24-4623-9617-6898FA057189"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "59879F82-813A-4261-9DCF-DB7A846027B5"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.2.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A6E52164-17F0-4C92-A15A-B66BAB393FF1"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.3.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "ECC5FD0A-898A-439F-8412-5E88408693E3"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A6235DB7-30E6-479E-A5D5-F31B8D73576F"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.5.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AE54AB58-B082-4FCA-866E-C5D5B551C737"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BFDF52C8-259F-4948-8877-40EB9609EFC8"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F01D51EF-E327-49C4-94D8-2BC2845AA5B9"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9A657542-06BF-4120-917B-790AED9CE7BB"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0CA6BC77-778C-4BD8-86A1-22F09DF063EE"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AFDB8336-B110-4452-A9C7-40C4859B58DB"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9DDFB0AF-89E6-4A26-B7FF-3BFD91F01006"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:44.12.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A903890E-A6C2-4562-AE80-C91BFDA2717A"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:45.1.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9AA76D54-CA52-44FF-ADE6-003C8FC82351"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:45.2.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9B2B43CC-095D-4FD2-9E1F-DE289A2357E6"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:45.3.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D9E83AE6-412F-4B18-9A17-E72B18F5115B"
},
{
"criteria": "cpe:2.3:a:cisco:webex_meetings:45.4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "14DE9D4D-F620-4084-8165-8A38C02785E3"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "psirt@cisco.com"
}