CVE-2026-28263 is a cross-site scripting vulnerability (CWE-79) in Dell PowerProtect Data Domain's Data Domain Operating System versions specified above. It allows a high privileged remote attacker to inject scripts by improper neutralization of input during web page generation. The vulnerability has a CVSS 3.1 base score of 5.9 with vector AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L, indicating network attack vector, low attack complexity, high privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation could allow a high privileged remote attacker to execute malicious scripts in the context of the affected web application, potentially leading to limited confidentiality, integrity, and availability impacts. The vulnerability requires high privileges and user interaction, reducing the likelihood of widespread exploitation. There are no known active exploits currently reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit remote access to the affected systems to trusted administrators only and monitor for suspicious activity. Follow Dell's official communications for updates on patches or mitigations.