CVE-2026-20178: Input Validation
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 action is needed. This vulnerability existed due to improper input validation of URL parameters in an HTTP request. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to click a crafted URL. A successful exploit could have allowed the attacker to redirect a user to a malicious website.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Operational
Cisco has addressed this vulnerability in the Cisco Webex App; no customer action is needed.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20178?
The severity of CVE-2026-20178 is rated medium with a score of 4.3.
How do I fix CVE-2026-20178?
No customer action is needed to fix CVE-2026-20178 as Cisco has addressed this vulnerability in the Cisco Webex App.
What does CVE-2026-20178 exploit?
CVE-2026-20178 exploits improper input validation in the browser-based version of Cisco Webex App.
Can CVE-2026-20178 be exploited remotely?
Yes, CVE-2026-20178 can be exploited by an unauthenticated remote attacker.
What type of attack is associated with CVE-2026-20178?
CVE-2026-20178 is associated with an attack that can redirect users to a malicious webpage.