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IBM DataPower Gateway EUVDEUVD-2026-94969

| CVE-2026-16111 HIGH
Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)
2026-10-08 ibm GHSA-27r3-8555-4mqr
7.5
CVSS 3.1 · Vendor: ibm
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach DataPower network service
  2. Delivery
    Send crafted malformed request
  3. Exploit
    Trigger type confusion (CWE-843)
  4. Execution
    Crash or hang gateway process
  5. Impact
    Denial of service for fronted traffic

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Type safety enforcement
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special conditions beyond network reachability - the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates a remote, unauthenticated attacker can trigger the type confusion by sending crafted input to a reachable DataPower Gateway service. Exploitation is limited to the specific affected build ranges (10.5.0.0-10.5.0.22, 10.6.1-10.6.6, 10.6.0.0-10.6.0.10, 11.0.0.0-11.0.0.2) and requires network access to the gateway's listening interface; impact is confined to availability (service crash/DoS) with no confidentiality or integrity effect, and a vendor patch is available to eliminate the condition.

Impact

The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) is internally consistent and describes a remotely reachable, low-complexity, unauthenticated flaw whose sole impact is availability (C:N/I:N/A:H) - a pure denial-of-service, matching CWE-843 (type confusion) and the description. No EPSS score, KEV listing, or SSVC decision data was supplied, and no public exploit is referenced, so exploitation likelihood cannot be quantified from the input; the only mitigating signal is that a vendor patch is available. The exploitability metrics look severe (network, no auth, no user interaction), but the impact ceiling is capped: there is no confidentiality or integrity loss and no code execution, so this is a service-disruption risk rather than a compromise risk. Net assessment: a credible but bounded priority - patch promptly on internet-facing or high-availability DataPower deployments, but it does not carry the lateral-movement or data-breach weight its 7.5 score might suggest. EPSS is absent (not low - simply not provided), so do not read the missing probability as evidence of low real-world interest.

Exploit ScenarioDerived

A remote, unauthenticated attacker sends specially crafted input to an affected IBM DataPower Gateway over the network, triggering the type confusion flaw and crashing or hanging the gateway, interrupting all API/traffic processing it fronts. No authentication or user interaction is required (AV:N/AC:L/PR:N/UI:N). No public proof-of-concept exploit is identified in the provided data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 08, 2026

A type confusion flaw (CWE-843) in IBM DataPower Gateway lets a remote, unauthenticated attacker crash a reachable gateway service, producing a denial-of-service condition. Affected builds are 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2; the assessed CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) confirms a network-reachable, low-complexity, unauthenticated trigger with availability-only impact. IBM has published a vendor fix via its support advisory, and no public exploit code has been identified at time of analysis (no CISA KEV listing).

RemediationAI

IBM has released a vendor fix for this issue; apply the IBM-provided firmware update for your affected release stream as documented in the advisory at https://www.ibm.com/support/pages/node/7289775, which specifies the corrected level for each of the 10.5.0.x, 10.6.0.x, 10.6.x CD, and 11.0.0.x lines (the input data confirms patch availability from the vendor but does not enumerate the exact corrected build numbers, so consult the advisory rather than assuming a version). Until the update can be staged, reduce exposure by restricting network access to DataPower service interfaces to trusted source addresses via firewall ACLs or interface binding - accepting that this may break legitimate client traffic and does not fix the underlying type confusion - and by fronting the gateway with a reverse proxy or filtering layer that rejects malformed or unexpected payload shapes, with the trade-off of added latency and possible false positives on legitimate requests. Monitor for repeated process terminations, crash loops, or availability gaps on the gateway, since successful exploitation presents as service interruption rather than data compromise; no public exploit code has been identified at time of analysis, so there is no known signature to prioritize beyond these controls.

Affected VersionsENISA

DataPower Gateway 10.5.0 10.5.0.0 ≤10.5.0.22
DataPower Gateway 10.6CD 10.6.1 ≤10.6.6
DataPower Gateway 11.0.0 11.0.0.0 ≤11.0.0.2
DataPower Gateway 10.6.0 10.6.0.0 ≤10.6.0.10

Affected Packages

euvd datapower_gateway_10_5_0 no fix
euvd datapower_gateway_10_6_0 no fix
euvd datapower_gateway_10_6cd no fix
euvd datapower_gateway_11_0_0 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 4 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The root cause is CWE-843, Type Confusion, a memory-safety class in which the product allocates or casts an object as one type but later accesses it as an incompatible type, so field and vtable offsets are interpreted against the wrong layout. In DataPower Gateway the flaw manifests as memory corruption (per the associated tags) inside a service that parses externally supplied input over the network, so a crafted request can drive execution into an invalid state and terminate the affected process. Because the CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, the vulnerable path is exposed on a listening interface, requires no credentials or user interaction, and yields only loss of availability - there is no demonstrated confidentiality or integrity impact and no scope change. The CPE data enumerates the affected streams as ibm:datapower_gateway_10.5.0, ibm:datapower_gateway_10.6.0, ibm:datapower_gateway_10.6cd, and ibm:datapower_gateway_11.0.0, matching the version ranges in the description across the 10.5, 10.6, 10.6 CD, and 11.0 firmware lines.

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Severity by source

Vendor (ibm) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI 7.5 HIGH

Remotely reachable gateway service exploitable without authentication or interaction (AV:N/AC:L/PR:N/UI:N); type confusion yields only denial of service, so C:N/I:N/A:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

DescriptionCVE.org

IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2 could allow an attacker to cause a denial of service due to a type confusion flaw.

Executive ViewAI

Why It Matters

IBM DataPower Gateway, a core integration and API gateway platform used to broker traffic between critical internal and external systems, contains a type confusion defect that allows any network-reachable party to crash an exposed gateway service without credentials. Because the impact is availability-only, the exposure is disruption of dependent applications and transaction flows rather than data theft, but a successful trigger can interrupt API traffic and customer-facing or partner-facing services. Organizations running affected 10.5, 10.6, or 11.0 builds should treat this as an operational continuity issue with a vendor remediation path already available.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.3%
Top 82% exploitable
Prevalence
Medium
specific enterprise vendor appliance, common in large orgs but not everywhere
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
High
Technical Impact
Partial

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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