Cisco Slido Insecure Direct Object Reference Vulnerability (CVE-2026-20219)

Overview

A vulnerability in the REST API of Cisco Slido could have allowed an authenticated, remote attacker to access the social profile data of other users or affect quiz and poll results. Cisco has addressed this vulnerability in Cisco Slido and no customer action is needed.

This vulnerability existed because of the presence of an insecure direct object reference. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by sending a crafted request to the vulnerable API endpoint. A successful exploit could have allowed the attacker to view the social profiles of other users or affect quiz and poll results.

As mentioned, Cisco has addressed this vulnerability in the Slido service, and no customer action is necessary to update on-premises software or devices. There are no workarounds that address this vulnerability.

Vendor advisories

• cisco-sa-slido-idor-CpsFmKxN · Cisco · affected: Cisco Slido, Cisco Webex Meetings (34 versions) · updated 2026-05-06 · advisory

Cisco Slido Insecure Direct Object Reference Vulnerability. Released 2026-05-06.

Affected:

• Cisco Slido
• Cisco Webex Meetings 39.10
• Cisco Webex Meetings 39.11
• Cisco Webex Meetings 39.6
• Cisco Webex Meetings 39.7
• Cisco Webex Meetings 39.7.4
• Cisco Webex Meetings 39.7.7
• Cisco Webex Meetings 39.8
• Cisco Webex Meetings 39.8.2
• Cisco Webex Meetings 39.8.3
• Cisco Webex Meetings 39.8.4
• Cisco Webex Meetings 39.9
• Cisco Webex Meetings 39.9.1
• Cisco Webex Meetings 40.1
• Cisco Webex Meetings 40.2
• Cisco Webex Meetings 40.4
• Cisco Webex Meetings 40.4.10
• Cisco Webex Meetings 40.6
• Cisco Webex Meetings 40.6.2
• Cisco Webex Meetings 42.10
• Cisco Webex Meetings 43.2
• Cisco Webex Meetings 43.1
• Cisco Webex Meetings 42.11
• Cisco Webex Meetings 43.3
• Cisco Webex Meetings 42.6
• Cisco Webex Meetings 42.9
• Cisco Webex Meetings 43.4
• Cisco Webex Meetings 42.12
• Cisco Webex Meetings 42.8
• Cisco Webex Meetings 42.7
• Cisco Webex Meetings 43.4.2
• Cisco Webex Meetings 43.5.0
• Cisco Webex Meetings 43.4.1
• Cisco Webex Meetings 43.6.0
• Cisco Webex Meetings 43.6.1

Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com