CVE-2026-20170 | Cisco Webex Contact Center Contact Center Service cross site scripting (cisco-sa-webexcc-xss-WEX5nUnA / EUVD-2026-22967)

VDB-357753 · CVE-2026-20170 · EUVD-2026-22967 CISCO WEBEX CONTACT CENTER CONTACT CENTER SERVICE CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.1 $0-$5k 3.91+ Summaryinfo A vulnerability marked as problematic has been reported in Cisco Webex Contact Center. Affected by this vulnerability is an unknown functionality of the component Contact Center Service. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2026-20170. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component. Detailsinfo A vulnerability, which was classified as problematic, was found in Cisco Webex Contact Center (the affected version is unknown). This affects an unknown code of the component Contact Center Service. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity. The summary by CVE is: 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. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20170 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/15/2026). MITRE ATT&CK project uses the attack technique T1059.007 for this issue. Upgrading eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-22967). Productinfo Type Unified Communication Software Vendor Cisco Name Webex Contact Center License commercial Website Vendor: https://www.cisco.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.2 VulDB Meta Temp Score: 5.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.1 CNA Vector (cisco): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-80 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 10/08/2025 CVE reserved 04/15/2026 +189 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Vendor: cisco.com Advisory: cisco-sa-webexcc-xss-WEX5nUnA Status: Confirmed CVE: CVE-2026-20170 (🔒) GCVE (CVE): GCVE-0-2026-20170 GCVE (VulDB): GCVE-100-357753 EUVD: 🔒 Entryinfo Created: 04/15/2026 18:30 Updated: 04/15/2026 20:03 Changes: 04/15/2026 18:30 (64), 04/15/2026 20:03 (1) Complete: 🔍 Cache ID: 99:882:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸