Cisco Webex Meetings Cross-Site Scripting Vulnerability
CVE-2026-20233

6.1MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Webex Meetings
Vendor
CVE Published:
3 June 2026

Badges

👾 Exploit Exists

What is CVE-2026-20233?

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.

Affected Version(s)

Cisco Webex Meetings 39.7.7

Cisco Webex Meetings 39.9

Cisco Webex Meetings 40.4.10

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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