CVE-2026-11848: iRM-IEI Auth Bypass Vulnerability

CVE-2026-11848 Overview

CVE-2026-11848 is a Missing Authentication vulnerability [CWE-306] in the iRM-IEI Remote Management product developed by IEI Integration Corp. The flaw allows unauthenticated remote attackers to invoke a specific functionality and obtain partial system configuration information. The issue is reachable across the network and requires no privileges or user interaction. TWCERT published the advisory disclosing the weakness.

Critical Impact
Unauthenticated network attackers can retrieve partial system configuration data from iRM-IEI Remote Management, enabling reconnaissance for follow-on attacks against subsequent systems.

Affected Products

IEI Integration Corp iRM-IEI Remote Management (specific affected versions listed in TWCERT advisory)
Deployments exposing the iRM-IEI management interface to untrusted networks
Environments running unpatched iRM-IEI components alongside managed industrial or embedded systems

Discovery Timeline

2026-06-12 - CVE-2026-11848 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-11848

Vulnerability Analysis

The vulnerability stems from a function exposed by iRM-IEI Remote Management that performs no authentication before returning configuration data. An attacker reaches the endpoint over the network and invokes the functionality without supplying credentials. The service responds with partial system configuration details intended for authorized administrators.

Missing Authentication for a Critical Function [CWE-306] occurs when an application exposes a sensitive operation but does not verify the caller's identity. In this case, the disclosed data describes the managed environment and supports adversary reconnaissance. While the directly leaked data is limited in confidentiality impact, the CVSS 4.0 vector indicates significant downstream impact on subsequent system confidentiality, integrity, and availability.

The EPSS estimate places exploitation probability at 0.297% with a percentile near 21, but the low complexity and lack of authentication make opportunistic scanning likely once exploit details are published.

Root Cause

The root cause is the absence of an authentication check on a remotely accessible function within iRM-IEI Remote Management. The function returns configuration content that should be gated behind authenticated administrative access.

Attack Vector

The attack vector is network-based and unauthenticated. An attacker sends a crafted request to the exposed iRM-IEI management functionality from any host with network reachability. No user interaction is required, and the attacker does not need prior access or credentials.

No verified proof-of-concept code is publicly available. Refer to the TWCERT Security Advisory for vendor-specific technical detail.

Detection Methods for CVE-2026-11848

Indicators of Compromise

Unauthenticated HTTP or management-protocol requests to iRM-IEI Remote Management endpoints from external or unexpected internal sources.
Outbound responses from iRM-IEI hosts containing configuration fields delivered without a preceding authenticated session.
Sequential probing of management ports across multiple iRM-IEI deployments within a short time window.

Detection Strategies

Inspect access logs on iRM-IEI Remote Management for requests to configuration-related endpoints lacking a valid authentication token or session cookie.
Apply network detection rules to flag management-plane traffic originating from non-administrative network segments.
Correlate reconnaissance signals against the targeted functionality identified in the TWCERT Security Notification.

Monitoring Recommendations

Forward iRM-IEI access and authentication logs to a centralized SIEM for retention and correlation.
Alert on first-time source IPs interacting with management interfaces, particularly from outside administrator subnets.
Track the volume of configuration-data responses to identify scraping or enumeration behavior.

How to Mitigate CVE-2026-11848

Immediate Actions Required

Restrict network access to iRM-IEI Remote Management interfaces using firewall rules or VLAN segmentation, limiting reachability to known administrator hosts.
Audit recent logs for unauthenticated requests against the vulnerable functionality and investigate any anomalous responses.
Inventory all iRM-IEI deployments and confirm version data against the affected versions identified in the TWCERT advisory.

Patch Information

Apply the vendor update referenced in the TWCERT Security Advisory for IEI Integration Corp iRM-IEI Remote Management. Coordinate with IEI Integration Corp for the specific fixed version applicable to your deployment.

Workarounds

Place iRM-IEI management interfaces behind a VPN or jump host that enforces authentication before any management traffic is allowed.
Disable remote access to the affected functionality where operationally feasible until the patch is applied.
Implement strict access control lists on network devices to permit management traffic only from designated administrator workstations.

bash

# Example: restrict iRM-IEI management access to an administrator subnet
# Adjust interface, port, and source range to match the deployment
iptables -A INPUT -p tcp --dport <mgmt_port> -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport <mgmt_port> -j DROP