TI-2026-16418 Aliases CVE-2026-20219 GHSA-83ch-55jw-xp9w

Authorization bypass in Cisco Webex Meetings

LOW 24CWE-639Published 2026-05-06 · Updated 2026-05-06

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00168 6th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Webex Meetings	39.10; 39.11; 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; 40.1; 40.2; 40.4; 40.4.10; 40.6; 40.6.2; 42.10; 42.11; 42.6; 42.9; 42.12; 42.7; 43.1; 43.4; 43.4.2; 43.5.0; 43.4.1	—	No fix listed	CNA
Cisco	Cisco Slido	N/A	—	No fix listed	CNA

Cisco Webex Meetings VendorCisco Affected 39.10; 39.11; 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; 40.1; 40.2; 40.4; 40.4.10; 40.6; 40.6.2; 42.10; 42.11; 42.6; 42.9; 42.12; 42.7; 43.1; 43.4; 43.4.2; 43.5.0; 43.4.1 Fixed in — No fix listed CNA
Cisco Slido VendorCisco Affected N/A Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-20219
2026-10-03 Alias added: GHSA-83ch-55jw-xp9w

References

Other 1

cisco-sa-slido-idor-CpsFmKxN

TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

See all 7059 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences