Medium [CVE-2026-20170] Cisco Webex Contact Center Cross-Site Scripting Vulnerability
This medium-severity Cisco advisory covers CVE-2026-20170 affecting Webex Contact Center.
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Summary
A vulnerability in the Desktop Agent functionality of Cisco Webex Contact Center could have allowed an unauthenticated, remote attacker to conduct cross-site scripting attacks. Cisco has addressed this vulnerability in the Cisco Webex Contact Center service, and no customer action is needed.
This vulnerability existed because HTML and script content was not properly handled. 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 steal sensitive information from the browser, including authentication and session information.
There are no workarounds that address this vulnerability.
- Scope: This vulnerability affected Cisco Webex Contact Center, which is cloud based.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- A vulnerability in the Desktop Agent functionality of Cisco Webex Contact Center could have allowed an unauthenticated, remote attacker to conduct cross-site scripting attacks.
- Cisco has addressed this vulnerability in the Cisco Webex Contact Center service, and no customer action is needed.
- As mentioned, Cisco has addressed this vulnerability in the Cisco Webex Contact Center service, and no customer action is necessary to update on-premises software or devices.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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