CVE-2021-20399

mediumpriority · track · 37EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.79% (78th) EPSS

CVSS 6.4 · medium

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.4–9.1

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.07.1highCVSS:3.0/AV:N/PR:L/C:H/UI:N/AC:L/S:U/I:N/A:L/RC:C/E:U/RL:Osecondary · ENISA EU

v3.07.1highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Lsecondary · psirt@us.ibm.com USexploitability 2.8 · impact 4.2

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-611USprimary

affected products (8)

Products and version ranges known to be affected.

IBM QRadar SIEM≤ 7.3.0enisa_euvdEU
IBM QRadar SIEM≤ 7.4.0enisa_euvdEU
IBM QRadar SIEM≤ 7.3.3.Patch.8enisa_euvdEU
IBM QRadar SIEM≤ 7.4.3enisa_euvdEU
ibm qradar security information and event manager7.3.0 → 7.3.3nvdUScpe:2.3:a:ibm:qradar_security_information_and_event_manager:*:*:*:*:*:*:*:*
ibm qradar security information and event manager= 7.3.3nvdUScpe:2.3:a:ibm:qradar_security_information_and_event_manager:*:*:*:*:*:*:*:*
ibm qradar security information and event manager7.4.0 → 7.4.3nvdUScpe:2.3:a:ibm:qradar_security_information_and_event_manager:*:*:*:*:*:*:*:*
ibm qradar security information and event manager= 7.4.3nvdUScpe:2.3:a:ibm:qradar_security_information_and_event_manager:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-07-27modified 2026-06-17

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+1515 more

references (10)

External citations — patches, advisories, analysis.

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