LiveActive security incident?Get immediate response
CVE Record

CVE-2019-4402: IBM API Connect 2018.1 through 2018.4.1.6 developer portal could allow an unauthorized user to cause a deni...

IBM API Connect 2018.1 through 2018.4.1.6 developer portal could allow an unauthorized user to cause a denial of service via an unprotected API. IBM X-Force ID: 162263.

HighCVSS 8.6Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This flaw can let an unauthenticated remote user disrupt the IBM API Connect Developer Portal. The published impact is denial of service only, not data theft or system takeover. Business urgency is high where the Developer Portal supports customer, partner, or developer onboarding and is reachable from the internet.

Executive priority

Prioritize remediation if IBM API Connect Developer Portal is externally reachable or business-critical. The main risk is service disruption to developers, partners, or customers, not confidentiality loss. If no affected versions are deployed, document non-exposure and monitor IBM guidance.

Technical view

CVE-2019-4402 affects IBM API Connect 2018.1 through 2018.4.1.6 Developer Portal. Sources describe an unprotected API that can be abused by an unauthorized network attacker to cause denial of service. CVSS 3.0 is 8.6 with network access, low complexity, no privileges, no user interaction, and high availability impact.

Likely exposure

Exposure is limited to IBM API Connect Developer Portal deployments on versions 2018.1 through 2018.4.1.6. Internet-facing portals or portals reachable by untrusted users carry the clearest operational risk. The source bundle does not identify affected CPEs or additional IBM products.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. IBM X-Force records the issue, and the CVSS vector indicates unauthenticated network reachability and low attack complexity. Treat this as a credible availability risk, not confirmed in-the-wild exploitation.

Researcher notes

Key evidence is concise: IBM API Connect Developer Portal 2018.1 through 2018.4.1.6, unauthenticated denial of service via an unprotected API, IBM X-Force ID 162263, CVSS 8.6. Sources do not provide exploit details, affected CPEs, or a specific fixed version in the supplied bundle.

Mitigation direction

  • Check IBM advisory ibm10958193 for the official remediation or fixed release.
  • Upgrade or patch affected IBM API Connect Developer Portal deployments per IBM guidance.
  • Prioritize internet-facing or partner-facing Developer Portal instances first.
  • Reduce untrusted network exposure where operationally feasible until remediation is complete.
  • Monitor portal availability and error spikes during the remediation window.

Validation and detection

  • Inventory IBM API Connect Developer Portal versions across production and non-production environments.
  • Confirm whether any deployment runs 2018.1 through 2018.4.1.6.
  • Map which Developer Portal instances are internet-facing or reachable by untrusted users.
  • Verify IBM advisory remediation is applied and recorded in change evidence.
  • Review availability monitoring for unexplained portal outages or abnormal error rates.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2019-4402 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
8.6 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:H/C:N/AC:L/AV:N/S:C/PR:N/I:N/UI:N/RC:C/RL:O/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
8.6CVSS 3.0HighCVSS:3.0/A:H/C:N/AC:L/AV:N/S:C/PR:N/I:N/UI:N/RC:C/RL:O/E:U3.94Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.6High
CVSS 3.0 vector shape for CVE-2019-4402Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:H/C:N/AC:L/AV:N/S:C/PR:N/I:N/UI:N/RC:C/RL:O/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
IBMAPI Connect2018.1, 2018.4.1.6Listed
Weakness

CWE details

No CWE listed

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