CVE-2026-20170 Cross-site scripting in Cisco Webex Contact Center
Unauthenticated remote attackers can execute cross-site scripting attacks to steal sensitive browser information via malicious links.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-20170?
CVE-2026-20170 is a medium-severity cross-site scripting vulnerability in Cisco Webex Contact Center, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-80
Which versions are affected by CVE-2026-20170?
It affects 1 product.
Products include Cisco Webex Contact Center.
How do I fix CVE-2026-20170?
No fix has been published for CVE-2026-20170 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-20170 being exploited?
There is no known exploitation of CVE-2026-20170 in the wild and no public exploit code.
Sources
Also known as GHSA-fjg2-h4xx-5w8c.