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CVE Record

CVE-2021-20429: IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0 could disclose sensitive information due an overly p...

IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0 could disclose sensitive information due an overly permissive cross-domain policy. IBM X-Force ID: 196334.

LowCVSS 3.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

IBM QRadar User Behavior Analytics had an overly permissive cross-domain policy that could expose sensitive information. The CVE is rated low severity because exploitation requires high attack complexity and does not affect integrity or availability. Treat it as a data-exposure issue for QRadar environments rather than an emergency internet-scale flaw.

Executive priority

Handle in routine vulnerability maintenance unless the affected QRadar UBA interface is exposed to untrusted users or handles especially sensitive monitoring data. The business risk is confidentiality leakage from a security platform, not system takeover.

Technical view

CVE-2021-20429 affects IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0. The weakness is an overly permissive cross-domain policy that may allow sensitive information disclosure. CVSS 3.0 score is 3.7 with network attack vector, no privileges, no user interaction, high complexity, confidentiality low, and no integrity or availability impact.

Likely exposure

Exposure is limited to organizations running affected IBM QRadar User Behavior Analytics versions. The bundle does not establish that all QRadar SIEM deployments are affected, only the UBA component/version range cited.

Exploitation context

The source bundle does not report active exploitation, and the CVE is not listed as CISA KEV. Exploit maturity is marked unproven in the provided CVSS vector. High attack complexity reduces likelihood, but sensitive data exposure still matters in monitored security environments.

Researcher notes

Evidence is narrow: the bundle identifies information disclosure from an overly permissive cross-domain policy, but does not provide CWE, detailed exploit mechanics, or explicit fix text. Avoid expanding scope beyond IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0.

Mitigation direction

  • Identify any IBM QRadar User Behavior Analytics deployments and versions.
  • Review IBM advisory 6453107 for the official remediation path.
  • Prioritize upgrading or applying IBM-provided fixes for affected UBA versions.
  • Restrict access to QRadar administrative and application interfaces where feasible.
  • Monitor IBM X-Force entry 196334 for vendor updates.

Validation and detection

  • Inventory installed QRadar User Behavior Analytics app versions.
  • Confirm whether any instance is within 1.0.0 through 4.1.0.
  • Check IBM advisory for fixed-version or patch confirmation.
  • Review exposure of QRadar web interfaces to untrusted networks.
  • Document compensating controls if remediation is delayed.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2021-20429 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.7 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/C:L/A:N/AV:N/S:U/PR:N/AC:H/I:N/UI:N/RL:O/E:U/RC:C

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
3.7CVSS 3.0LowCVSS:3.0/C:L/A:N/AV:N/S:U/PR:N/AC:H/I:N/UI:N/RL:O/E:U/RC:C2.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

3.7Low
CVSS 3.0 vector shape for CVE-2021-20429Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/C:L/A:N/AV:N/S:U/PR:N/AC:H/I:N/UI:N/RL:O/E:U/RC:C

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMQRadar SIEM1.0.0, 4.1.1Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.