Always On VPN Security Updates June 2024

The Microsoft security updates for June 2024 have now been published. Reviewing the list of bulletins shows three security updates of importance to Always On VPN administrators. Two affect the Windows Server Routing and Remote Access (RRAS) service, and one affects the Remote Access Connection Manager (RasMan) service. None of the updates are critical this month, which is good news.


The following are the two security updates from this month’s cycle affecting Windows Server RRAS.

CVE-2024-30094 – Windows RRAS Remote Code Execution Vulnerability (Important)

CVE-2024-30095 – Windows RRAS Remote Code Execution Vulnerability (Important)


The following security update affects the Remote Access Connection Manager (RasMan) service on Windows Server systems.

CVE-2024-30069 – Windows Remote Access Connection Manager Information Disclosure Vulnerability (Important)


None of the security vulnerabilities disclosed this month are critical and require local access to the system to take advantage of the exploit. However, administrators should update their systems as soon as possible.

Additional Information

Microsoft June 2024 Security Updates

Always On VPN April 2024 Security Updates

Microsoft has released its security updates for April 2024. This month, a few vulnerabilities are potentially impacting Always On VPN administrators. Specifically, three updates address issues with the Windows Server Routing and Remote Access Service (RRAS). In addition, vulnerabilities affect the Remote Access Connection Manager (RasMan) service, affecting both VPN servers and clients.


Windows Server Routing and Remote Access (RRAS) has three security updates available this month. All three are Remote Code Execution (RCE) vulnerabilities but require user interaction to exploit the vulnerability. All three updates are rated as Important.





In addition to the vulnerabilities in RRAS, Microsoft announced numerous updates for vulnerabilities discovered in the Remote Access Connection Manager (RasMan) service. These vulnerabilities are related to information disclosure via buffer overruns. These updates affect both Windows RRAS servers and Windows Always On VPN clients. All updates are rated as Important.









While none of these vulnerabilities are critical, Always On VPN administrators are urged to update their affected systems soon.

Additional Information

April 2024 Security Updates

Always On VPN October 2023 Security Updates

Once again, it’s time to patch! After several quiet months, there are a few crucial updates Always On VPN administrators will want to get deployed soon. Thankfully, the impact of the security updates related to Always On VPN is low this time, as there is only one Remote Code Execution (RCE) vulnerability, and it’s for a legacy protocol that should be in limited use today.


CVE-2023-36726 addresses a security vulnerability in Windows Internet Key Exchange (IKE) that can lead to privilege escalation. An attacker who successfully exploits this vulnerability can elevate privileges to that of the local SYSTEM.


This month’s update discloses several Layer Two Tunneling Protocol (L2TP) vulnerabilities. The following CVEs all address a vulnerability where an attacker can send a specially crafted protocol message to a Windows Routing and Remote Access Service (RRAS) server, which could lead to remote code execution on the server.


The impact of the L2TP security vulnerabilities should be minimal in most organizations. L2TP is a legacy VPN protocol not commonly used for Always On VPN. However, misconfiguration can leave vulnerable RRAS servers exposed. Administrators must ensure that inbound UDP port 1723 is not open from the Internet. In addition, L2TP should be disabled on the RRAS server if not in use. See the article on the May 2023 security updates for details.

Additional Information

October 2023 Security Updates