---
title: "MAXHUB Pivot App Flaw Exposes Tenant Emails in Cleartext"
short_title: "MAXHUB Pivot app vulnerability exposes emails"
description: "Critical flaw in MAXHUB Pivot client app (CVE-2026-6411) allows attackers to decrypt tenant emails and cause DoS. Upgrade to v1.36.2+ now."
author: "Vitus"
date: 2024-10-02
categories: [Cybersecurity, Vulnerabilities]
tags: [maxhub, cve-2026-6411, cryptographic-flaw, dos, cybersecurity]
score: 0.78
cve_ids: [CVE-2026-6411]
---
## TL;DR
A critical vulnerability (CVE-2026-6411) in the MAXHUB Pivot client application (versions prior to v1.36.2) exposes tenant email addresses and metadata in cleartext due to a hardcoded AES key. Attackers can also trigger a denial-of-service (DoS) condition by enrolling unauthorized devices via MQTT. Users are urged to upgrade to v1.36.2 or later immediately to mitigate risks.
Main Content
### Introduction
Cybersecurity researchers have uncovered a high-severity vulnerability in the MAXHUB Pivot client application, a widely used collaboration tool in enterprise environments. Tracked as CVE-2026-6411, this flaw stems from the use of a hardcoded AES cryptographic key, enabling attackers to decrypt sensitive tenant data, including email addresses and associated metadata. Additionally, the vulnerability could allow threat actors to disrupt operations by causing a denial-of-service (DoS) condition through unauthorized device enrollment.
This article delves into the technical details, impact, and mitigation steps for this critical security issue.
### Key Points
- Vulnerability ID: CVE-2026-6411 (CVSS 7.3, High Severity)
- Affected Software: MAXHUB Pivot client application (versions prior to v1.36.2)
- Root Cause: Hardcoded AES key allowing decryption of encrypted tenant data
- Exploitation Impact: Access to tenant email addresses in cleartext and potential DoS via MQTT
- Mitigation: Upgrade to v1.36.2 or later via OTA update
- Public Exploitation: None reported as of May 2026
### Technical Details
The vulnerability resides in the MAXHUB Pivot client application’s cryptographic implementation. Specifically, the application uses a hardcoded AES key to encrypt tenant email addresses and metadata. This flawed design allows attackers with access to the encrypted data to decrypt it effortlessly, exposing sensitive information in cleartext.
Furthermore, the flaw enables threat actors to enroll unauthorized devices into a tenant’s environment via the MQTT protocol, a lightweight messaging protocol often used in IoT and enterprise applications. This could lead to a DoS condition, disrupting normal operations for affected tenants.
#### CWE Classification
The vulnerability is classified under:
- CWE-327: Use of a Broken or Risky Cryptographic Algorithm
### Impact Assessment
#### Data Exposure
The primary risk associated with CVE-2026-6411 is the unauthorized access to tenant email addresses and metadata. Since the data is encrypted with a hardcoded key, attackers can decrypt it without requiring advanced technical skills. This poses significant privacy and compliance risks, particularly for organizations handling sensitive or regulated data.
#### Denial-of-Service (DoS)
By exploiting the MQTT enrollment mechanism, attackers can flood a tenant’s environment with unauthorized devices, leading to service disruptions. This could impact collaboration tools, meetings, and other critical business functions reliant on the MAXHUB Pivot application.
#### Global Reach
The MAXHUB Pivot client application is deployed worldwide, primarily in the Information Technology sector. Organizations across industries, including education, healthcare, and corporate enterprises, may be at risk if they have not updated to the latest version.
### Mitigation Steps
MAXHUB has released a patch (v1.36.2) to address this vulnerability. Users are strongly advised to take the following steps:
1. Upgrade Immediately: Update the MAXHUB Pivot client application to v1.36.2 or later via the OTA (Over-the-Air) update mechanism.
2. Verify Installation: Ensure all devices running the application are updated to the latest version.
3. Monitor for Exploitation: While no public exploitation has been reported, organizations should monitor for unusual activity, such as unauthorized device enrollments or data access attempts.
4. Follow CISA Guidelines: Implement defensive measures recommended by CISA, such as:
- Minimizing network exposure for control system devices.
- Isolating control system networks from business networks.
- Using secure remote access methods like VPNs (ensure they are updated to the latest version).
For more details, visit the MAXHUB Support Page.
### Affected Systems
| Vendor | Product | Affected Versions | Status |
|------------|---------------------------------|-----------------------------|------------------|
| MAXHUB | MAXHUB Pivot client application | Versions prior to v1.36.2 | Known Affected |
## Conclusion
The CVE-2026-6411 vulnerability in the MAXHUB Pivot client application highlights the critical importance of secure cryptographic practices in software development. The use of a hardcoded AES key not only exposes sensitive tenant data but also introduces risks of operational disruption through DoS attacks.
Organizations using MAXHUB Pivot must prioritize upgrading to v1.36.2 or later to mitigate these risks. Additionally, adhering to CISA’s recommended cybersecurity practices can help prevent exploitation and strengthen overall security posture.
Stay vigilant, keep systems updated, and monitor for emerging threats to safeguard your digital environment.
## References
[^1]: CISA. "ICSA-26-127-01 MAXHUB Pivot Client Application Vulnerability". Retrieved 2024-10-02.
[^2]: MITRE. "CWE-327: Use of a Broken or Risky Cryptographic Algorithm". Retrieved 2024-10-02.
[^3]: MAXHUB. "Support Page". Retrieved 2024-10-02.