Cisco Webex Contact Center Cross-Site Scripting Vulnerability
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. 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. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webexcc-xss-WEX5nUnA Security Impact Rating: Medium CVE: CVE-2026-20170
CSIRTS triage
- What
- A vulnerability could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.
- Who is affected
- Users of the Cisco Webex Contact Center service.
- Urgency
- Remediation is not required as Cisco has already addressed the vulnerability.
- Action
- No action needed as the vulnerability has been addressed.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-201700.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-20170 | coverage & exploitation status | NVD · CVE.org |
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