CVE-2021-20399: IBM Qradar Security Information And Event Manager

Critical severity, CVSS 9.1. EPSS: 1.8% chance of exploitation in the next 30 days.

IBM Qradar SIEM 7.3.0 to 7.3.3 Patch 8 and 7.4.0 to 7.4.3 GA is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 196073.

Affected products

• IBM Qradar Security Information And Event Manager: from 7.3.0, before 7.3.3 (fixed in 7.3.3); from 7.4.0, before 7.4.3 (fixed in 7.4.3); version 7.3.3 only; version 7.4.3 only

Published 2021-07-27. Last modified 2026-06-17.