CVE-2026-3623 is a privilege escalation vulnerability in IBM Netezza Performance Server Replication Services versions 3.0.2.0 through 3.0.5.0. It allows an attacker with low privileges to escalate to root by exploiting execution with unnecessary privileges (CWE-250). This enables the attacker to execute commands as root, obtain a root shell, change the root password, modify or remove system-wide files, and install persistent backdoors. The vulnerability results in complete loss of confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 7.8, reflecting high severity with local attack vector, low attack complexity, and no user interaction required. No vendor advisory or patch is currently available, and no known exploits have been reported.

Successful exploitation leads to full system compromise with root-level access. The attacker can execute arbitrary commands as root, change the root password, modify or delete critical system files, and install persistent backdoors. This results in complete loss of confidentiality, integrity, and availability of the affected system.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict low-privileged user access to the affected IBM Netezza Performance Server Replication Services versions and monitor for suspicious activity related to privilege escalation attempts.