CVE-2021-20400
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow...
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 196074.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 196074.
- Record
CVE-2021-20400- CVSS 3.0
- 5.9 Medium
CVSS:3.0/PR:N/AC:H/I:N/C:H/A:N/AV:N/UI:N/S:U/RL:O/E:U/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-7818
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 196074.
- Record
EUVD-2021-7818- CVSS 3.0
- 5.9 Medium
CVSS:3.0/PR:N/AC:H/I:N/C:H/A:N/AV:N/UI:N/S:U/RL:O/E:U/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6fqj-w26x-q42v No score
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow...
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 196074.
- Record
GHSA-6fqj-w26x-q42v- Weakness
- CWE-326
- Updated
- 2026-11-02
NVD
IBM QRadar SIEM 7.3 and 7.4 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 196074.
- Record
CVE-2021-20400- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20400 is a medium vulnerability (CVSS 5.9) in Ibm Qradar Siem, published December 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 52nd percentile. No source names a fixed version.