Threat Notice Originally Appeared on TheHackerNews.com
Microsoft’s guest access feature was built to make collaboration seamless across organizations. But under the surface, a major security gap is allowing attackers to use these guest accounts as stealth backdoors—giving them unexpected levels of control inside target environments.
This isn’t just a theoretical risk. Security researchers have confirmed that with default settings, a guest user can create entire cloud subscriptions inside your Microsoft environment—and then take full ownership of them. Most IT security teams don’t even realize this is possible.
Here’s how the attack works:
An attacker with access to a billing account in their own Entra environment gets invited to your Microsoft tenant as a guest.
Once in, they create a new subscription from their home environment and transfer it into yours.
Because of how Microsoft billing permissions work, they retain full owner control of that subscription—even inside your tenant.
This newly created subscription shows up under your management group—but it’s not governed by your standard policies and may not trigger your security tools.
From that foothold, attackers can:
Disable or weaken default security policies.
Create managed identities that appear legitimate.
Expose high-level admin accounts through misused role assignments.
Launch phishing campaigns using trusted devices.
Why This Is So Dangerous
Most IT teams audit Entra directory roles or Azure RBAC permissions. But this exploit sidesteps those reviews entirely using billing roles—an overlooked layer of access that exists outside typical security boundaries.
To make matters worse:
Guest invitation settings are often wide open by default—meaning anyone, even a guest, can invite another guest.
Federated logins reduce control—your tenant may not be able to enforce MFA or device compliance for the guest’s login.
This tactic is being used in the wild—it’s already been seen by researchers like BeyondTrust, who have flagged it as a real-world privilege escalation method.
If you rely on Microsoft 365, Azure, or Entra for collaboration and identity management, this risk needs your immediate attention. Here’s how to get ahead of it:
✅ Review and lock down guest invitation settings – Limit who can invite guests and monitor existing guest users.
✅ Enable Microsoft’s subscription transfer controls – This policy blocks unauthorized users from transferring subscriptions to your tenant.
✅ Audit all subscriptions – Especially those not created by your internal team. Look for signs of ownership anomalies.
✅ Run a risk assessment – Our team can help you uncover guest-created resources, misconfigured roles, and invisible paths to privilege.
The Bottom Line
Identity misconfigurations are the new exploits. This guest subscription flaw is just one example of how small gaps in configuration can create massive opportunities for attackers. If your security tools are only focused on traditional roles and permissions, you may be blind to what’s really happening.
Let’s close the door before attackers walk in. Schedule a 26-minute Cyber Risk & Resilience Call with our team, and we’ll show you exactly where the risks lie—and how to eliminate them.
References
https://thehackernews.com/2025/06/beware-hidden-risk-in-your-entra.html?m=1
https://www.mnemonic.io/resources/blog/abusing-dynamic-groups-in-azure-ad-for-privilege-escalation/
Questions or concerns? Schedule a quick 26-minute call with Greg Mauer to discuss your concerns or answer your questions.
I Consent to Receive Notifications, Alerts, and Communications from the company. Message frequency varies. You can reply STOP to unsubscribe at any time.
Yes, we offer access to senior IT consultants and provide vCSO(Virtual Chief Security Officer) as a service for our clients. Our vCSO service provides your organization with expert leadership and strategic direction tailored to your unique cybersecurity and legal compliance needs. We are here to help you navigate the complexities of cybersecurity and ensure that your security posture is robust, compliant, and capable of addressing evolving cyber threats. Book a call today to get expert help with your company’s cybersecurity and compliance.
We have a high level of confidence in the security posture of our company and our clients. Our security stack includes several components to ensure strong and resilient cybersecurity measures. We provide comprehensive risk management, regular audits and assessments, advanced security technologies, employee training and awareness, and incident response planning. Our systems and solutions follow established industry standards and best practices to keep your company safe and your data secure. Since every company has different risks depending on the data, systems, utilization, and more, we can work with your team to develop a robust security plan and implement the proper measures as needed. Reach out today to strengthen your company’s security posture!
We provide robust Disaster Recovery (DR) plans, covering preventative, detective, and corrective measures. Our DR strategies are tailored to each client’s specific needs and are designed to ensure rapid recovery and continuity of operations in the event of any disaster. These plans are regularly reviewed and tested to guarantee they function effectively and meet the highest standards of resilience and reliability. And if a disaster were to occur outside of regular business hours, we have you covered! At qnectU, we have a response time of mere minutes for emergency after-hours calls, ensuring a rapid response to implement your Disaster Recovery plan. Book a call today to protect your company in the event of a disaster.
Here at qnectU, we conduct regular risk assessments as a core part of our risk management strategy. Our process is comprehensive, involving identification, categorization, and response planning for potential security risks, including technical vulnerabilities, access controls, and more. These assessments help us understand, control, and mitigate all forms of cyber risk, ensuring that our security measures are effective and up-to-date. But most importantly, we provide continual risk assessments at pre-determined intervals based on your company’s risk level. This ensures that issues are corrected, new risks are identified, and compliance is properly documented. Want to see how our in-depth business risk assessments work? Book a consultation today to get an in-depth risk assessment of your company’s current network security.
We are committed to following proven change management principles. We understand the importance of structured and systematic processes in implementing changes that affect cybersecurity protocols and IT environments. Our approach is based on industry-recognized frameworks and methodologies that ensure changes are managed effectively, focusing on minimizing risks, enhancing security posture, and achieving strategic objectives.
We specialize in Compliance as a Service (CaaS), and our program is designed to meet a wide range of regulatory requirements to ensure that your business adheres to the highest standards of compliance. We demonstrate our compliance through detailed assessments, documentation, and third-party audits. Our expertise and ongoing support can give you confidence that your company’s sensitive information is managed securely and in full compliance with all regulations.
In today’s world a business can easily be compromised via a “supply chain hack.” There have been several instances where the IT company has exposed all of their clients to hacking due to their own lack of cybersecurity measures. In order to prevent this within our own company, we work closely with a third party for comprehensive auditing services to ensure that all cybersecurity and compliance requirements are met. Our rigorous audit process involves a thorough examination of our systems and practices against established industry standards and best practices. This collaboration provides an objective perspective and deep expertise to identify any potential vulnerabilities, ensuring that our cybersecurity measures are robust, up-to-date, and in full compliance with regulatory demands.
Compliance as a Service (Caas) means that our experts will give you specialized help in handling all the rules and regulations your business needs to follow. We do this by providing expert guidance to help you determine what rules apply to your business and how to follow them. All while giving ongoing support to monitor your compliance status and updates in regulations. This may also include any advanced tools to help manage compliance tasks and risk management surrounding compliance. CaaS takes the hassle out of compliance so you can focus on running your business with confidence.
Gregory Mauer is the founder and CEO of our company, a best-selling author, speaker, and a cybersecurity & compliance expert. He has been on stage with the likes of the “Nice Shark”, Robert Herjavec, Siri co-founder Adam Cheyer, and business coach and author Mike Michalowicz.
Yes, we offer access to senior IT consultants and provide vCSO(Virtual Chief Security Officer) as a service for our clients. Our vCSO service provides your organization with expert leadership and strategic direction tailored to your unique cybersecurity and legal compliance needs. We are here to help you navigate the complexities of cybersecurity and ensure that your security posture is robust, compliant, and capable of addressing evolving cyber threats. Book a call today to get expert help with your company’s cybersecurity and compliance.
We have a high level of confidence in the security posture of our company and our clients. Our security stack includes several components to ensure strong and resilient cybersecurity measures. We provide comprehensive risk management, regular audits and assessments, advanced security technologies, employee training and awareness, and incident response planning. Our systems and solutions follow established industry standards and best practices to keep your company safe and your data secure. Since every company has different risks depending on the data, systems, utilization, and more, we can work with your team to develop a robust security plan and implement the proper measures as needed. Reach out today to strengthen your company’s security posture!
We provide robust Disaster Recovery (DR) plans, covering preventative, detective, and corrective measures. Our DR strategies are tailored to each client’s specific needs and are designed to ensure rapid recovery and continuity of operations in the event of any disaster. These plans are regularly reviewed and tested to guarantee they function effectively and meet the highest standards of resilience and reliability. And if a disaster were to occur outside of regular business hours, we have you covered! At qnectU, we have a response time of mere minutes for emergency after-hours calls, ensuring a rapid response to implement your Disaster Recovery plan. Book a call today to protect your company in the event of a disaster.
Here at qnectU, we conduct regular risk assessments as a core part of our risk management strategy. Our process is comprehensive, involving identification, categorization, and response planning for potential security risks, including technical vulnerabilities, access controls, and more. These assessments help us understand, control, and mitigate all forms of cyber risk, ensuring that our security measures are effective and up-to-date. But most importantly, we provide continual risk assessments at pre-determined intervals based on your company’s risk level. This ensures that issues are corrected, new risks are identified, and compliance is properly documented. Want to see how our in-depth business risk assessments work? Book a consultation today to get an in-depth risk assessment of your company’s current network security.
We are committed to following proven change management principles. We understand the importance of structured and systematic processes in implementing changes that affect cybersecurity protocols and IT environments. Our approach is based on industry-recognized frameworks and methodologies that ensure changes are managed effectively, focusing on minimizing risks, enhancing security posture, and achieving strategic objectives.
We specialize in Compliance as a Service (CaaS), and our program is designed to meet a wide range of regulatory requirements to ensure that your business adheres to the highest standards of compliance. We demonstrate our compliance through detailed assessments, documentation, and third-party audits. Our expertise and ongoing support can give you confidence that your company’s sensitive information is managed securely and in full compliance with all regulations.
In today’s world a business can easily be compromised via a “supply chain hack.” There have been several instances where the IT company has exposed all of their clients to hacking due to their own lack of cybersecurity measures. In order to prevent this within our own company, we work closely with a third party for comprehensive auditing services to ensure that all cybersecurity and compliance requirements are met. Our rigorous audit process involves a thorough examination of our systems and practices against established industry standards and best practices. This collaboration provides an objective perspective and deep expertise to identify any potential vulnerabilities, ensuring that our cybersecurity measures are robust, up-to-date, and in full compliance with regulatory demands.
Compliance as a Service (Caas) means that our experts will give you specialized help in handling all the rules and regulations your business needs to follow. We do this by providing expert guidance to help you determine what rules apply to your business and how to follow them. All while giving ongoing support to monitor your compliance status and updates in regulations. This may also include any advanced tools to help manage compliance tasks and risk management surrounding compliance. CaaS takes the hassle out of compliance so you can focus on running your business with confidence.
Gregory Mauer is the founder and CEO of our company, a best-selling author, speaker, and a cybersecurity & compliance expert. He has been on stage with the likes of the “Nice Shark”, Robert Herjavec, Siri co-founder Adam Cheyer, and business coach and author Mike Michalowicz.