External risk intelligence

IBM Db2 Mirror for i Code Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-17184

IBM Db2 Mirror for i is a specialized database replication and high-availability solution designed for internal enterprise server environments. While network-reachable, it is not an internet-facing service and is typically deployed behind secure internal network controls, making direct public internet exposure uncommon.

Ibm Db2 Mirror For I

7.4 to 7.6

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

IBM Db2 Mirror for i has a vulnerability that could allow an attacker to execute code by manipulating file names or paths. This issue affects specific versions of the software, which is used for database replication and high availability. The primary concern is to confirm if this specific technology is in use and if there is any potential exposure.

Code execution risk via file path manipulation.
Impacts IBM Db2 Mirror for i systems.
Confirm relevance and exposure for IBM Db2 Mirror for i.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted input to the affected system over the network. This input could trick the system into using an attacker-controlled file name or path, potentially leading to the execution of arbitrary code.

No authentication or user interaction needed.
Input with malicious file names/paths triggers it.
Risk of arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, a remote attacker could potentially execute arbitrary code by manipulating file names or paths, impacting the availability and integrity of the affected system.

System data and service integrity.
Exploits external control of file name.
Arbitrary code execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

Understanding ownership for this critical vulnerability hinges on the specific deployment of IBM Db2 Mirror for i. Typically, the database administrators or the platform team responsible for managing IBM i environments would lead remediation efforts. Initial steps should focus on identifying all instances of Db2 Mirror for i within the organization, confirming their network reachability and business criticality, and then engaging the accountable owner to plan and execute the necessary actions.

Database or Platform Teams own resolution.
Verify Db2 Mirror for i instance reachability.
Plan and coordinate remediation activities.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is IBM Db2 Mirror for i?

It is a specialized database replication and high-availability technology. It ensures continuous data synchronization between IBM i server environments, allowing organizations to maintain near-zero downtime for their critical business applications by keeping multiple system copies identical in real-time.

What does CWE-73 mean for CVE-2026-17184?

This vulnerability is classified as External Control of File Name or Path. It means the software does not properly validate user-provided inputs used to specify file locations. Because of this weakness, an attacker can manipulate input to point the system toward malicious or unauthorized files, which the application then processes as if they were legitimate, leading to arbitrary code execution.

How can an attacker trigger this vulnerability?

An attacker exploits this by sending specially crafted network input containing malicious file names or directory paths to the affected system. The bug is triggered when the system blindly trusts and acts upon these external path inputs. It is not triggered by standard database operations or legitimate internal administrative commands that use pre-defined, trusted file paths.

Is this CVE a risk to my network?

According to Halo Surface Signal, the risk is classified as unlikely for most organizations. Because Db2 Mirror for i is a specialized tool for internal database high availability, it is typically deployed behind strict network controls. While technically network-reachable, it is not designed to be an internet-facing service, which significantly limits the pool of potential attackers who could reach it.

What steps should I take if I use this software?

First, inventory your systems to confirm if you are running the affected versions of Db2 Mirror for i. Coordinate with your database administration or platform teams to assess the network reachability of these instances. Once you have identified your footprint, work with the system owners to review the official IBM security guidance and plan for the necessary updates to secure your database environment.

References

www.ibm.com/support/pages/node/7283359

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.