What is CVE-2026-20178?

CVE-2026-20178 is a medium-severity vulnerability in Cisco Webex App, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-06-17.

How severe is CVE-2026-20178?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Open Redirect in Cisco Webex App

CVE-2026-20178

A vulnerability in the browser-based version of Cisco Webex App could have allowed an unauthenticated, remote attacker to redirect users to a malicious webpage. Cisco has addressed this vulnerability in the Cisco Webex App, and no customer…

Vulnerability class: Open Redirect

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Cisco Webex App — versions N/A

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20178?: CVE-2026-20178 is a medium-severity vulnerability in Cisco Webex App, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-06-17.
How severe is CVE-2026-20178?: Medium severity. CVSS v3 base score is 4.3 out of 10.