{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-20184", "tracking": { "current_release_date": "2026-04-17T04:10:01.290358Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-20184", "initial_release_date": "2026-04-15T17:21:18.375806Z", "revision_history": [ { "date": "2026-04-15T17:21:18.375806Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (18).| Products created (38).| References created (1).| CWES updated (1)." }, { "date": "2026-04-15T17:21:33.761665Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-15T17:28:43.510389Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-04-15T18:08:25.533292Z", "number": "4", "summary": "Unknown change." }, { "date": "2026-04-15T18:08:39.894679Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| CVSS created.| References created (8)." }, { "date": "2026-04-15T18:08:43.170048Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-04-15T18:09:39.128548Z", "number": "7", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| References created (1).| CWES updated (1)." }, { "date": "2026-04-15T18:09:40.652457Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-04-16T10:31:13.701203Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-16T10:31:20.843395Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-04-16T11:44:58.282448Z", "number": "11", "summary": "Source connected.| CVE status created. (valid)| Products created (1).| Product Identifiers created (1).| References created (4)." }, { "date": "2026-04-16T11:45:00.487610Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-04-16T12:04:59.216345Z", "number": "13", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-04-16T12:05:02.656992Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-04-16T15:11:20.759638Z", "number": "15", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-16T15:11:23.826679Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-04-17T00:08:50.961840Z", "number": "17", "summary": "References created (1).| References removed (1)." }, { "date": "2026-04-17T02:42:33.866857Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)" } ], "status": "interim", "version": "18" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/39.10", "product": { "name": "vers:unknown/39.10", "product_id": "CSAFPID-1321330" } }, { "category": "product_version_range", "name": "vers:unknown/39.11", "product": { "name": "vers:unknown/39.11", "product_id": "CSAFPID-1321321" } }, { "category": "product_version_range", "name": "vers:unknown/39.6", "product": { "name": "vers:unknown/39.6", "product_id": "CSAFPID-1321316" } }, { "category": "product_version_range", "name": "vers:unknown/39.7", "product": { "name": "vers:unknown/39.7", "product_id": "CSAFPID-1321326" } }, { "category": "product_version_range", "name": "vers:unknown/39.7.4", "product": { "name": "vers:unknown/39.7.4", "product_id": "CSAFPID-1321322" } }, { "category": "product_version_range", "name": "vers:unknown/39.7.7", "product": { "name": "vers:unknown/39.7.7", "product_id": "CSAFPID-1321313" } }, { "category": "product_version_range", "name": "vers:unknown/39.8", "product": { "name": "vers:unknown/39.8", "product_id": "CSAFPID-1321327" } }, { "category": "product_version_range", "name": "vers:unknown/39.8.2", "product": { "name": "vers:unknown/39.8.2", "product_id": "CSAFPID-1321318" } }, { "category": "product_version_range", "name": "vers:unknown/39.8.3", "product": { "name": "vers:unknown/39.8.3", "product_id": "CSAFPID-1321328" } }, { "category": "product_version_range", "name": "vers:unknown/39.8.4", "product": { "name": "vers:unknown/39.8.4", "product_id": "CSAFPID-1321319" } }, { "category": "product_version_range", "name": "vers:unknown/39.9", "product": { "name": "vers:unknown/39.9", "product_id": "CSAFPID-1321314" } }, { "category": "product_version_range", "name": "vers:unknown/39.9.1", "product": { "name": "vers:unknown/39.9.1", "product_id": "CSAFPID-1321323" } }, { "category": "product_version_range", "name": "vers:unknown/40.1", "product": { "name": "vers:unknown/40.1", "product_id": "CSAFPID-1321320" } }, { "category": "product_version_range", "name": "vers:unknown/40.2", "product": { "name": "vers:unknown/40.2", "product_id": "CSAFPID-1321329" } }, { "category": "product_version_range", "name": "vers:unknown/40.4", "product": { "name": "vers:unknown/40.4", "product_id": "CSAFPID-1321324" } }, { "category": "product_version_range", "name": "vers:unknown/40.4.10", "product": { "name": "vers:unknown/40.4.10", "product_id": "CSAFPID-1321315" } }, { "category": "product_version_range", "name": "vers:unknown/40.6", "product": { "name": "vers:unknown/40.6", "product_id": "CSAFPID-1321325" } }, { "category": "product_version_range", "name": "vers:unknown/40.6.2", "product": { "name": "vers:unknown/40.6.2", "product_id": "CSAFPID-1321317" } }, { "category": "product_version_range", "name": "vers:unknown/42.10", "product": { "name": "vers:unknown/42.10", "product_id": "CSAFPID-6046956" } }, { "category": "product_version_range", "name": "vers:unknown/42.11", "product": { "name": "vers:unknown/42.11", "product_id": "CSAFPID-6046957" } }, { "category": "product_version_range", "name": "vers:unknown/42.12", "product": { "name": "vers:unknown/42.12", "product_id": "CSAFPID-6046958" } }, { "category": "product_version_range", "name": "vers:unknown/42.6", "product": { "name": "vers:unknown/42.6", "product_id": "CSAFPID-6046952" } }, { "category": "product_version_range", "name": "vers:unknown/42.7", "product": { "name": "vers:unknown/42.7", "product_id": "CSAFPID-6046953" } }, { "category": "product_version_range", "name": "vers:unknown/42.8", "product": { "name": "vers:unknown/42.8", "product_id": "CSAFPID-6046954" } }, { "category": "product_version_range", "name": "vers:unknown/42.9", "product": { "name": "vers:unknown/42.9", "product_id": "CSAFPID-6046955" } }, { "category": "product_version_range", "name": "vers:unknown/43.1", "product": { "name": "vers:unknown/43.1", "product_id": "CSAFPID-6046959" } }, { "category": "product_version_range", "name": "vers:unknown/43.10", "product": { "name": "vers:unknown/43.10", "product_id": "CSAFPID-6046971" } }, { "category": "product_version_range", "name": "vers:unknown/43.11", "product": { "name": "vers:unknown/43.11", "product_id": "CSAFPID-6046972" } }, { "category": "product_version_range", "name": "vers:unknown/43.12", "product": { "name": "vers:unknown/43.12", "product_id": "CSAFPID-6046973" } }, { "category": "product_version_range", "name": "vers:unknown/43.2", "product": { "name": "vers:unknown/43.2", "product_id": "CSAFPID-6046960" } }, { "category": "product_version_range", "name": "vers:unknown/43.3", "product": { "name": "vers:unknown/43.3", "product_id": "CSAFPID-6046961" } }, { "category": "product_version_range", "name": "vers:unknown/43.4", "product": { "name": "vers:unknown/43.4", "product_id": "CSAFPID-6046962" } }, { "category": "product_version_range", "name": "vers:unknown/43.4.1", "product": { "name": "vers:unknown/43.4.1", "product_id": "CSAFPID-6046963" } }, { "category": "product_version_range", "name": "vers:unknown/43.4.2", "product": { "name": "vers:unknown/43.4.2", "product_id": "CSAFPID-6046964" } }, { "category": "product_version_range", "name": "vers:unknown/43.5.0", "product": { "name": "vers:unknown/43.5.0", "product_id": "CSAFPID-6046965" } }, { "category": "product_version_range", "name": "vers:unknown/43.6.0", "product": { "name": "vers:unknown/43.6.0", "product_id": "CSAFPID-6046966" } }, { "category": "product_version_range", "name": "vers:unknown/43.6.1", "product": { "name": "vers:unknown/43.6.1", "product_id": "CSAFPID-6046967" } }, { "category": "product_version_range", "name": "vers:unknown/43.7", "product": { "name": "vers:unknown/43.7", "product_id": "CSAFPID-6046968" } }, { "category": "product_version_range", "name": "vers:unknown/43.8", "product": { "name": "vers:unknown/43.8", "product_id": "CSAFPID-6046969" } }, { "category": "product_version_range", "name": "vers:unknown/43.9", "product": { "name": "vers:unknown/43.9", "product_id": "CSAFPID-6046970" } }, { "category": "product_version_range", "name": "vers:unknown/44.1", "product": { "name": "vers:unknown/44.1", "product_id": "CSAFPID-6046974" } }, { "category": "product_version_range", "name": "vers:unknown/44.10", "product": { "name": "vers:unknown/44.10", "product_id": "CSAFPID-6046983" } }, { "category": "product_version_range", "name": "vers:unknown/44.11", "product": { "name": "vers:unknown/44.11", "product_id": "CSAFPID-6046984" } }, { "category": "product_version_range", "name": "vers:unknown/44.12", "product": { "name": "vers:unknown/44.12", "product_id": "CSAFPID-6046985" } }, { "category": "product_version_range", "name": "vers:unknown/44.2", "product": { "name": "vers:unknown/44.2", "product_id": "CSAFPID-6046975" } }, { "category": "product_version_range", "name": "vers:unknown/44.3", "product": { "name": "vers:unknown/44.3", "product_id": "CSAFPID-6046976" } }, { "category": "product_version_range", "name": "vers:unknown/44.4", "product": { "name": "vers:unknown/44.4", "product_id": "CSAFPID-6046977" } }, { "category": "product_version_range", "name": "vers:unknown/44.5", "product": { "name": "vers:unknown/44.5", "product_id": "CSAFPID-6046978" } }, { "category": "product_version_range", "name": "vers:unknown/44.6", "product": { "name": "vers:unknown/44.6", "product_id": "CSAFPID-6046979" } }, { "category": "product_version_range", "name": "vers:unknown/44.7", "product": { "name": "vers:unknown/44.7", "product_id": "CSAFPID-6046980" } }, { "category": "product_version_range", "name": "vers:unknown/44.8", "product": { "name": "vers:unknown/44.8", "product_id": "CSAFPID-6046981" } }, { "category": "product_version_range", "name": "vers:unknown/44.9", "product": { "name": "vers:unknown/44.9", "product_id": "CSAFPID-6046982" } }, { "category": "product_version_range", "name": "vers:unknown/45.1", "product": { "name": "vers:unknown/45.1", "product_id": "CSAFPID-6046986" } }, { "category": "product_version_range", "name": "vers:unknown/45.2", "product": { "name": "vers:unknown/45.2", "product_id": "CSAFPID-6046987" } }, { "category": "product_version_range", "name": "vers:unknown/45.3", "product": { "name": "vers:unknown/45.3", "product_id": "CSAFPID-6046988" } }, { "category": "product_version_range", "name": "vers:unknown/45.4", "product": { "name": "vers:unknown/45.4", "product_id": "CSAFPID-6046989" } } ], "category": "product_name", "name": "Cisco Webex Meetings" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/services", "product": { "name": "vers:unknown/services", "product_id": "CSAFPID-6051190", "product_identification_helper": { "cpe": "cpe:/a:cisco:webex:services" } } } ], "category": "product_name", "name": "WebEx" } ], "category": "vendor", "name": "Cisco" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-20184", "cwe": { "id": "CWE-295", "name": "Improper Certificate Validation" }, "notes": [ { "category": "description", "text": "A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed an unauthenticated, remote attacker to impersonate any user within the service.\r\n\r\nThis vulnerability existed because of improper certificate validation. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by connecting to a service endpoint and supplying a crafted token. A successful exploit could have allowed the attacker to gain unauthorized access to legitimate Cisco Webex services.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/20xxx/CVE-2026-20184.json" }, { "category": "description", "text": "A vulnerability in the integration of single sign-on (SSO) with Control Hub in Cisco Webex Services could have allowed an unauthenticated, remote attacker to impersonate any user within the service.This vulnerability existed because of improper certificate validation. Prior to this ", "title": "cisco - https://sec.cloudapps.cisco.com/security/center/publicationService.x?limit=20" }, { "category": "other", "text": "0.00051", "title": "EPSS" }, { "category": "other", "text": "7.2", "title": "NCSC Score" }, { "category": "other", "text": "Is related to a product by vendor Cisco, There is cvss data available from source Cisco, There is news data available from source Bleepingcomputer, There is product data available from source Certbundde, There is cwe data available from source Cisco", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "The CVSS vector string contains AV:N (Attack Vector: Network)", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-1321313", "CSAFPID-1321314", "CSAFPID-1321315", "CSAFPID-1321316", "CSAFPID-1321317", "CSAFPID-1321318", "CSAFPID-1321319", "CSAFPID-1321320", "CSAFPID-1321321", "CSAFPID-1321322", "CSAFPID-1321323", "CSAFPID-1321324", "CSAFPID-1321325", "CSAFPID-1321326", "CSAFPID-1321327", "CSAFPID-1321328", "CSAFPID-1321329", "CSAFPID-1321330", "CSAFPID-6046952", "CSAFPID-6046953", "CSAFPID-6046954", "CSAFPID-6046955", "CSAFPID-6046956", "CSAFPID-6046957", "CSAFPID-6046958", "CSAFPID-6046959", "CSAFPID-6046960", "CSAFPID-6046961", "CSAFPID-6046962", "CSAFPID-6046963", "CSAFPID-6046964", "CSAFPID-6046965", "CSAFPID-6046966", "CSAFPID-6046967", "CSAFPID-6046968", "CSAFPID-6046969", "CSAFPID-6046970", "CSAFPID-6046971", "CSAFPID-6046972", "CSAFPID-6046973", "CSAFPID-6046974", "CSAFPID-6046975", "CSAFPID-6046976", "CSAFPID-6046977", "CSAFPID-6046978", "CSAFPID-6046979", "CSAFPID-6046980", "CSAFPID-6046981", "CSAFPID-6046982", "CSAFPID-6046983", "CSAFPID-6046984", "CSAFPID-6046985", "CSAFPID-6046986", "CSAFPID-6046987", "CSAFPID-6046988", "CSAFPID-6046989", "CSAFPID-6051190" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/20xxx/CVE-2026-20184.json" }, { "category": "external", "summary": "Source - cisco", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cui-cert-8jSZYhWL/csaf/cisco-sa-webex-cui-cert-8jSZYhWL.json" }, { "category": "external", "summary": "Source - cisco", "url": "https://sec.cloudapps.cisco.com/security/center/publicationService.x?limit=20" }, { "category": "external", "summary": "Source - securityweek", "url": "https://www.securityweek.com/cisco-patches-critical-vulnerabilities-in-webex-ise/" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1132.json" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisco-says-critical-webex-services-flaw-requires-customer-action/" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=10000" }, { "category": "external", "summary": "Source - hkcert", "url": "https://www.hkcert.org/security-bulletin/cisco-products-multiple-vulnerabilities_20260417" }, { "category": "external", "summary": "News - securityweek", "url": "https://www.securityweek.com/cisco-patches-critical-vulnerabilities-in-webex-ise/" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/security/cisco-says-critical-webex-services-flaw-requires-customer-action/" }, { "category": "external", "summary": "Reference - certbundde; cisco; cveprojectv5", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cui-cert-8jSZYhWL" }, { "category": "external", "summary": "Reference - cisco", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html" }, { "category": "external", "summary": "Reference - cisco", "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html" }, { "category": "external", "summary": "Reference - cisco", "url": "https://www.cisco.com/c/en/us/support/index.html" }, { "category": "external", "summary": "Reference - cisco", "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html" }, { "category": "external", "summary": "Reference - cisco", "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes" }, { "category": "external", "summary": "Reference - cisco", "url": "https://www.cisco.com/go/psirt" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1132.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1132" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webexcc-xss-WEX5nUnA" }, { "category": "external", "summary": "Reference - cisco", "url": "https://help.webex.com/en-us/article/nstvmyo/Manage-single-sign-on-integration-in-Control-Hub#Cisco_Task_in_List_GUI.dita_07fbdc21-41a0-482f-99dc-b8c17adbd087" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1321313", "CSAFPID-1321314", "CSAFPID-1321315", "CSAFPID-1321316", "CSAFPID-1321317", "CSAFPID-1321318", "CSAFPID-1321319", "CSAFPID-1321320", "CSAFPID-1321321", "CSAFPID-1321322", "CSAFPID-1321323", "CSAFPID-1321324", "CSAFPID-1321325", "CSAFPID-1321326", "CSAFPID-1321327", "CSAFPID-1321328", "CSAFPID-1321329", "CSAFPID-1321330", "CSAFPID-6046952", "CSAFPID-6046953", "CSAFPID-6046954", "CSAFPID-6046955", "CSAFPID-6046956", "CSAFPID-6046957", "CSAFPID-6046958", "CSAFPID-6046959", "CSAFPID-6046960", "CSAFPID-6046961", "CSAFPID-6046962", "CSAFPID-6046963", "CSAFPID-6046964", "CSAFPID-6046965", "CSAFPID-6046966", "CSAFPID-6046967", "CSAFPID-6046968", "CSAFPID-6046969", "CSAFPID-6046970", "CSAFPID-6046971", "CSAFPID-6046972", "CSAFPID-6046973", "CSAFPID-6046974", "CSAFPID-6046975", "CSAFPID-6046976", "CSAFPID-6046977", "CSAFPID-6046978", "CSAFPID-6046979", "CSAFPID-6046980", "CSAFPID-6046981", "CSAFPID-6046982", "CSAFPID-6046983", "CSAFPID-6046984", "CSAFPID-6046985", "CSAFPID-6046986", "CSAFPID-6046987", "CSAFPID-6046988", "CSAFPID-6046989", "CSAFPID-6051190" ] } ], "title": "CVE-2026-20184" } ] }