Critical Vulnerability in Windows Message Queuing Service Exposes Hundreds of Thousands of Systems to Attacks

Windows administrators have been put on high alert as a new threat has emerged in the form of a critical MSMQ QueueJumper bug. If left unpatched, the vulnerability exposes organizations to the risk of attacks from malicious actors who can exploit the vulnerability to bypass security measures and gain unauthorized access. Microsoft has urged all users to update their systems as soon as possible to avoid potential attacks. In this article, we’ll explore the details of this threat, the impact it could have on organizations, and the steps Windows admins can take to mitigate the risk.


Security experts are warning of a severe vulnerability in the optional Windows Message Queuing (MSMQ) middleware service. Microsoft has already patched the flaw in this month’s Patch Tuesday, but hundreds of thousands of systems may still be at risk. The service is available on all Windows operating systems and can be enabled on PowerShell or the Control Panel. However, unauthenticated attackers could remotely execute malicious MSMQ packets on unpatched servers. Past instances of similar vulnerabilities being exploited mean the flaw is an “attractive target” for cyber criminals, says Microsoft. Check Point Research has revealed that over 360,000 Internet-exposed servers are potentially vulnerable.


As a Windows admin, it is crucial to stay up-to-date with the latest threats and vulnerabilities to ensure the safety and security of your system. The MSMQ QueueJumper bug is one such threat that can have serious consequences if left unpatched. With Microsoft issuing a warning to patch this critical vulnerability, it is essential to act fast and install the necessary updates. By doing so, you can protect your system against potential cyberattacks and keep your business running smoothly. Remember, prevention is always better than cure, so take the necessary steps to safeguard your organization today.