Skip to main content
cvebuzz

CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2026-20184

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.

CVSS 9.8 · CriticalBuzz score 35.9

Buzz score

Why this CVE is surfacing

Buzz score total 35.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 17.9 · diversity 18.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
17.9
5 evidence mentions in the snapshot
Diversity score
18.0
5 sources across 3 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
5 source links · newest first
  • Cisco Webex SSO flaw needs manual certificate update to fixCSO Online

    Admins who use Cisco Webex Services configured to use trust anchors within the SSO integration with Control Hub must install a new identity provider certificate to close a critical vulnerability, or risk losing access control. Cisco said in an advisory this week that admins must upload a new identity provider (IdP) SAML certificate to Webex […]

    newswww.csoonline.comApr 16, 2026, 10:29 PM
  • Cisco fixed four critical flaws in Identity Services and WebexSecurity Affairs

    Cisco fixed four critical flaws in Identity Services and Webex that could allow code execution and user impersonation. Cisco has addressed four critical vulnerabilities affecting its Identity Services and Webex platforms. The flaws could allow attackers to execute arbitrary code and impersonate any user within the affected services. The issues pose serious security risks, prompting […]

    newssecurityaffairs.comApr 16, 2026, 7:19 PM
  • Cisco Webex Services Certificate Validation VulnerabilityCisco Security Advisories

    om/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cui-cert-8jSZYhWL Security Impact Rating: Critical CVE: CVE-2026-20184

    vendorsec.cloudapps.cisco.comApr 16, 2026, 6:52 PM
  • Cisco Patches Critical Vulnerabilities in Webex, ISESecurityWeek

    The flaws can be exploited remotely to impersonate users or execute arbitrary commands on the underlying OS.

    newswww.securityweek.comApr 16, 2026, 10:04 AM
  • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cui-cert-8jSZYhWLsec.cloudapps.cisco.com

    No excerpt available.

    Vendor Advisorysec.cloudapps.cisco.comApr 15, 2026, 5:17 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2026-56820

    Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, `OcspClient` doe…

    CVSS 7.4 · High
    5 mentions
  • CVE-2026-56624

    Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH. Server-side OpenSSH user certificate…

    CVSS 7.3 · High
    2 mentions
  • CVE-2026-46428

    lettre is a a mailer library for Rust. Starting in version 0.10.1 and prior to version 0.11.22, an inverted-boolean bug in lettre's `boring-tls` integration silently disables TLS…

    CVSS 9.1 · Critical
    4 mentions
  • CVE-2026-13410

    Dancer::Plugin::Auth::Google versions through 0.07 for Perl have TLS verification disabled. The default user agent is initialised with SSL_verify_mode explicitly disabled. An at…

    CVSS 8.2 · High
    4 mentions
  • CVE-2026-38974

    Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.

    CVSS 5.3 · Medium
    2 mentions
  • CVE-2026-13385

    An Improper Validation of Integrity Check Value and Improper Certificate Validation in certain ASUS router models allows a remote man-in-the-middle(MITM) user to make the router d…

    CVSS 9.5 · Critical
    1 mention