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CVE Record

CVE-2020-4509: IBM QRadar SIEM 7.3 and 7.4 is vulnerable to an XML External Entity Injection (XXE) attack when processing...

IBM QRadar SIEM 7.3 and 7.4 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: 182364.

HighCVSS 7.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

IBM QRadar SIEM versions 7.3 and 7.4 can mishandle XML data, allowing a highly privileged remote attacker to read sensitive information or consume memory. The business concern is confidentiality exposure in a core security monitoring platform, not confirmed public exploitation.

Executive priority

Treat as a high-priority vulnerability for QRadar environments because compromise could expose sensitive security data from a monitoring platform. Urgency is lower than known-exploited issues, but affected systems should be remediated through IBM guidance.

Technical view

CVE-2020-4509 is an XML External Entity injection issue in IBM QRadar SIEM 7.3 and 7.4 when processing XML data. The CVSS 3.0 score is 7.6 with network access, low complexity, high privileges required, no user interaction, high confidentiality impact, and low availability impact.

Likely exposure

Exposure is limited to organizations running IBM QRadar SIEM 7.3 or 7.4, especially where privileged remote users can submit or trigger XML processing. The source bundle does not identify specific endpoints, deployment configurations, or CPEs.

Exploitation context

The CVE record says exploitation requires high privileges and network access. CISA KEV status is false, and the provided sources do not confirm active exploitation, public exploit code, or observed attacks.

Researcher notes

Sources confirm XXE behavior but do not name the vulnerable parser, endpoint, request shape, patch level, or indicators of compromise. Avoid assuming unauthenticated reachability; the CVSS vector requires high privileges.

Mitigation direction

  • Identify all IBM QRadar SIEM 7.3 and 7.4 deployments.
  • Review IBM advisory 6220154 for official remediation guidance.
  • Apply IBM-provided fixes or maintenance updates for affected systems.
  • Limit privileged QRadar access to required trusted administrators.
  • Monitor QRadar memory pressure and abnormal XML-processing failures during remediation.

Validation and detection

  • Confirm QRadar SIEM version and build against the IBM advisory.
  • Verify IBM remediation is installed on each affected QRadar system.
  • Review privileged account access paths to QRadar management functions.
  • Check logs for unusual errors, memory exhaustion, or sensitive data access around XML workflows.
  • Document systems that remain affected and their compensating controls.
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.

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CVE-2020-4509 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.6 (3.0)
Known Exploited
No
Published

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

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
7.6CVSS 3.0HighCVSS:3.0/PR:H/UI:N/A:L/S:C/AC:L/I:N/AV:N/C:H/RL:O/RC:C/E:U2.34.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.6High
CVSS 3.0 vector shape for CVE-2020-4509Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 SIEM7.3, 7.4Listed
Weakness

CWE details

No CWE listed

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