CVE-2026-20184 | Cisco Webex Meetings up to 45.4 certificate validation (cisco-sa-webex-cui-cert-8jSZYhWL)

VDB-357746 · CVE-2026-20184 · GCVE-0-2026-20184 CISCO WEBEX MEETINGS UP TO 45.4 CERTIFICATE VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.7 $0-$5k 2.24+ Summaryinfo A vulnerability was found in Cisco Webex Meetings and classified as critical. This issue affects some unknown processing. Such manipulation leads to certificate validation. This vulnerability is documented as CVE-2026-20184. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component. Detailsinfo A vulnerability was found in Cisco Webex Meetings and classified as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. CVE summarizes: 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 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. The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2026-20184 since 10/08/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/15/2026). This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project. Upgrading eliminates this vulnerability. Productinfo Type Unified Communication Software Vendor Cisco Name Webex Meetings Version 39.6 39.7 39.7.4 39.7.7 39.8 39.8.2 39.8.3 39.8.4 39.9 39.9.1 39.10 39.11 40.1 40.2 40.4 40.4.10 40.6 40.6.2 42.6 42.7 42.8 42.9 42.10 42.11 42.12 43.1 43.2 43.3 43.4 43.4.1 43.4.2 43.5.0 43.6.0 43.6.1 43.7 43.8 43.9 43.10 43.11 43.12 44.1 44.2 44.3 44.4 44.5 44.6 44.7 44.8 44.9 44.10 44.11 44.12 45.1 45.2 45.3 45.4 License commercial Website Vendor: https://www.cisco.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.7 VulDB Meta Temp Score: 6.7 VulDB Base Score: 3.7 VulDB Temp Score: 3.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.8 CNA Vector (cisco): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Certificate validation CWE: CWE-295 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 10/08/2025 CVE reserved 04/15/2026 +189 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Vendor: cisco.com Advisory: cisco-sa-webex-cui-cert-8jSZYhWL Status: Confirmed CVE: CVE-2026-20184 (🔒) GCVE (CVE): GCVE-0-2026-20184 GCVE (VulDB): GCVE-100-357746 Entryinfo Created: 04/15/2026 18:28 Changes: 04/15/2026 18:28 (64) Complete: 🔍 Cache ID: 99:986:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸