CVE-2021-20399 json
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…
published 2021-07-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7817
- cvss
- 7.1
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ibm qradar_security_information_and_event_manager 7.3.3, 7.4.3
- ibm.com/support/pages/node/6475263 advisory
Exploit prediction
1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.1 | CVSS:3.0/AV:N/PR:L/C:H/UI:N/AC:L/S:U/I:N/A:L/RC:C/E:U/RL:O |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| CNA | 3.0 | 7.1 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:N/A:P |
Affected products
- IBM QRadar SIEM
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
ibm.com
/support/pages/node/6475263
patch, vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/196073
vdb-entry, vendor-advisory
Sources
- CVE List CVE-2021-20399
- NVD CVE-2021-20399
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