How severe is CVE-2026-20170?

CVE-2026-20170 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-20170 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20170?

CVE-2026-20170 affects Cisco Webex Contact Center. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20170?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-20170 have an EU (EUVD) identifier?

Yes. CVE-2026-20170 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22967.

When was CVE-2026-20170 published?

CVE-2026-20170 was published on 2026-04-15 and last updated on 2026-07-01.

CVE-2026-20170

CVE-2026-20170 is a medium-severity vulnerability in Cisco Webex Contact Center with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-80.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22967
Weakness: CWE-80
Affected product: Cisco Webex Contact Center
Published: 2026-04-15
Last modified: 2026-07-01

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.

Frequently asked questions

What is CVE-2026-20170?: 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.
How severe is CVE-2026-20170?: CVE-2026-20170 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-20170 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20170?: CVE-2026-20170 affects Cisco Webex Contact Center. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20170?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20170 have an EU (EUVD) identifier?: Yes. CVE-2026-20170 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22967.
When was CVE-2026-20170 published?: CVE-2026-20170 was published on 2026-04-15 and last updated on 2026-07-01.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webexcc-xss-WEX5nUnA

Affected products (1)

cpe:2.3:a:cisco:webex_contact_center:-:*:*:*:cloud-based:*:*:*

Other CWE-80 vulnerabilities

CVE-2024-39363 — Critical (CVSS 9.6): A cross-site scripting (xss) vulnerability exists in the login.cgi set_lang_CountryCode() functionality of Wavlink…
CVE-2023-39216 — Critical (CVSS 9.6): Improper input validation in Zoom Desktop Client for Windows before 5.14.7 may allow an unauthenticated user to enable…
CVE-2025-53883 — Critical (CVSS 9.3): A Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability allows attackers to run…
CVE-2026-32891 — Critical (CVSS 9.0): Anchorr is a Discord bot for requesting movies and TV shows and receiving notifications when items are added to a media…
CVE-2026-57532 — High (CVSS 8.8): Malicious HTML content contained in the layout specification of a PDF ticket or badge layout was executed when the PDF…
CVE-2026-6002 — High (CVSS 8.8): Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in DivvyDrive Information…

Browse all CWE-80 vulnerabilities →