IBM QRadar SIEM Critical Vulnerabilities

This advisory (WID-SEC-2026-0783) details critical vulnerabilities in IBM QRadar SIEM, specifically affecting versions earlier than 7.5.0 UP15. The vulnerabilities have a high CVSS Base Score of 9.8 and a Temporal Score of 8.5, enabling attackers to execute arbitrary code, disclose sensitive information, perform denial-of-service attacks, conduct cross-site scripting attacks, and manipulate files remotely. The advisory notes that mitigation measures are available.

Organizations using affected versions of IBM QRadar SIEM must urgently review and apply available patches or mitigation strategies to address these critical security flaws. Failure to do so could lead to severe security breaches, including unauthorized access and control over critical systems. The advisory was published on March 18, 2026, with an update on March 19, 2026.