CVE-2026-45451 in UniStream Pro
Summary
by MITRE • 10/15/2026
: Improper Authentication vulnerability in Unitronics Unitronics UniStream Pro/UniLogic.
This issue affects Unitronics UniStream Pro/UniLogic: Unitronics UniStream Pro versions only (B10 / C10) – UniLogic versions prior to 1.41.329.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified in the Unitronics UniStream Pro and UniLogic software environment represents a critical failure in access control mechanisms, specifically categorized under Improper Authentication as defined by Common Weakness Enumeration (CWE-287). This flaw allows an attacker to bypass intended authentication controls, potentially gaining unauthorized access to industrial control system components. The affected systems include Unitronics UniStream Pro hardware variants B10 and C10 when paired with UniLogic software versions prior to 1.41.329. In the context of operational technology (OT) environments, such vulnerabilities pose a severe risk because they undermine the foundational security principle that only authorized personnel should interact with critical infrastructure controls.
From a technical perspective, improper authentication flaws typically arise from insufficient validation of user credentials or session management tokens during the login process. An attacker exploiting this weakness could potentially bypass password requirements, exploit default credentials, or manipulate session identifiers to assume the identity of an administrator. This level of access is particularly dangerous in industrial settings where administrative privileges often grant control over programmable logic controllers (PLCs), human-machine interfaces (HMIs), and other critical operational assets. The absence of robust authentication checks means that malicious actors do not need complex exploits or privilege escalation techniques to gain entry, significantly lowering the barrier for attack execution.
The operational impact of this vulnerability is substantial, as it directly threatens the availability, integrity, and confidentiality of industrial processes. If an attacker gains unauthorized administrative access through this flaw, they could alter program logic within PLCs, leading to unpredictable machine behavior, production halts, or even physical damage to equipment. Furthermore, such access enables lateral movement across the network, allowing adversaries to pivot from the engineering workstation level into broader operational networks. This aligns with tactics observed in advanced persistent threat campaigns targeting industrial sectors, where initial access via weak authentication is often the first step toward more sophisticated attacks like data exfiltration or sabotage.
In terms of industry frameworks, this vulnerability maps directly to MITRE ATT&CK techniques related to Initial Access and Credential Access. Specifically, it relates to T1078 Valid Accounts, which describes attackers using legitimate credentials to gain access to systems without needing to exploit software vulnerabilities beyond the authentication bypass itself. Additionally, CWE-287 highlights the systemic nature of this issue, indicating that the flaw is not merely a coding error but a design or implementation deficiency in how identity verification is handled within the UniLogic environment. Organizations relying on these units for critical infrastructure must recognize that weak authentication mechanisms are often exploited by automated tools and script-kiddie actors alike due to their simplicity and effectiveness.
Mitigation strategies should prioritize immediate remediation through software updates, as Unitronics has released version 1.41.329 of UniLogic which addresses this specific weakness. Administrators must ensure that all affected B10 and C10 units are upgraded to the patched version or later. In addition to patching, organizations should enforce strict network segmentation policies to isolate OT networks from corporate IT environments, thereby limiting the attack surface available to potential intruders. Implementing multi-factor authentication where supported by hardware interfaces and enforcing strong password policies for all user accounts further reduces the risk of exploitation. Regular security audits and penetration testing focused on industrial control systems are also recommended to identify any residual configuration weaknesses that could complement this vulnerability in a real-world attack scenario.