What is CVE-2020-4509?

CVE-2020-4509 is a high-severity vulnerability in IBM Qradar Security Information And Event Manager, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.6/10. Published 2020-06-04.

How severe is CVE-2020-4509?

High severity. CVSS v3 base score is 7.6 out of 10.

XXE in IBM Qradar Security Information And Event Manager

CVE-2020-4509

IBM QRadar SIEM 7.3 and 7.4 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: 182364.

Vulnerability class: XXE (XML External Entity)

Published 2020-06-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L.

EPSS exploit prediction

EPSS: 0.015 (73.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

IBM Qradar Security Information And Event Manager — versions 7.3.0, 7.4.0
IBM Qradar Siem — versions 7.3, 7.4
Linux Kernel

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

www.ibm.com/support/pages/node/6220154 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/182364 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4509?: CVE-2020-4509 is a high-severity vulnerability in IBM Qradar Security Information And Event Manager, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.6/10. Published 2020-06-04.
How severe is CVE-2020-4509?: High severity. CVSS v3 base score is 7.6 out of 10.