Vulnerability record · CVE-2021-20399 · published 27 July 2021

CVE-2021-20399: Ibm qradar security information and event manager xml external entity (xxe) vulnerability

Ibm · Qradar Security Information And Event Manager

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.

9.1 CVSS 3.1 Critical EPSS 1.8% · top 22.5% CWE-611 · XML external entity (XXE)

9.1CVSS 3.1 base score, v2 6.4

1.8%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Qradar Security Information And Event Manager Ibm

References

Link	Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/196073	VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6475263	PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/196073	VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6475263	PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-20399), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.