Security readout for executives and security teams
Plain-English summary
IBM QRadar SIEM versions 7.3, 7.4, and 7.5 had improper certificate validation in some inter-host communications. The main business risk is exposure of confidential data if an attacker can successfully interfere with those communications under higher-complexity conditions.
Executive priority
Prioritize remediation in the normal vulnerability cycle, with faster handling for internet-adjacent or weakly segmented QRadar deployments. The risk is meaningful because QRadar is security-critical, but current sources do not support active exploitation or critical urgency.
Technical view
CVE-2021-29755 is a network attack vector issue in QRadar SIEM inter-host communications. CVSS 3.0 is 5.9 with high confidentiality impact, no integrity or availability impact, no privileges or user interaction required, and high attack complexity. The source bundle does not provide CWE details or exploit mechanics.
Likely exposure
Organizations running IBM QRadar SIEM 7.3, 7.4, or 7.5 should assess exposure, especially distributed deployments with inter-host traffic. Exact vulnerable and remediated build boundaries should be confirmed against IBM guidance.
Exploitation context
The source bundle does not state active exploitation, and KEV status is false. CVSS indicates remote reachability but high attack complexity. Treat this as a confidentiality risk requiring vendor-guided remediation rather than an emergency exploitation response.
Researcher notes
Evidence is limited to the CVE record, IBM advisory reference, and IBM X-Force entry. The supplied data names improper certificate validation for some inter-host communications but does not provide CWE mapping, exploit details, or specific mitigation text beyond vendor references.
Mitigation direction
- Review IBM advisory for supported fixed or remediated QRadar levels.
- Inventory QRadar SIEM 7.3, 7.4, and 7.5 deployments.
- Apply IBM-recommended updates or fixes once confirmed from vendor guidance.
- Restrict QRadar inter-host communication paths to trusted networks where feasible.
Validation and detection
- Confirm QRadar version, fix pack, and update pack levels.
- Compare installed levels with IBM advisory and X-Force entry.
- Identify distributed QRadar nodes using inter-host communications.
- Review network controls protecting QRadar node-to-node traffic.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-29755 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/UI:N/AV:N/I:N/C:H/S:U/PR:N/A:N/AC:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/UI:N/AV:N/I:N/C:H/S:U/PR:N/A:N/AC:H/E:U/RL:O/RC:C2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/UI:N/AV:N/I:N/C:H/S:U/PR:N/A:N/AC:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/6605431CVE reference · x_refsource_CONFIRM
- ibm-qradar-cve202129755-info-disc (202015)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.