Is KB5026372 causing an issue with VPN connections?

Anonymous

We have a number of users that have had recent updates of KB5026372 and this has seemingly stopped their VPNs from connecting (loses connection instantly as soon as VPN connected, no more internet access), we use L2TP/IPsec with pre shared key. We have troubleshooted this with the network team, but nothing has changed and they are confident its not an issue caused by us. I have uninstalled KB5026372 on my machine, which had the issue also and then VPN works. Issue we have here is that our updates are handled automatically and it will pull down the updates again and install. Only solution is to pause updates for a set period of time in the hope that this gets resolved in a future update.

Has anyone else reported these issues? I have seen a few articles online regarding this and slowness of some VPNs after the update (which i had before it eventually just stopped working), but no solution other than uninstall.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

Anonymous

Hello! My name is Mostafa, and I will try my best to assist you with this so that you find a satisfactory solution.

I’m sorry that you are experiencing this issue. Yes, many users have been reports of VPN connection issues after installing KB5026372. The update is causing problems with VPN connections, especially L2TP/IPSec VPNs.

If your updates are handled automatically, and it will pull down the updates again and install, you can pause updates for a set period in the hope that this gets resolved in a future update.

Go to Settings > Update & Security > Windows Update to pause Windows Update. You can click Pause updates for seven days to block updates for a week; extending this time by clicking again later is possible.

Review the below article.

https://www.windowslatest.com/2023/05/13/window...

If the above steps do not help, reach out to me, and I will be happy to help and try my best to resolve your issue. Thank you.

Best,

Mostafa

__________________________________________________

Disclaimer - There is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before downloading and installing it.

0 comments

51 additional answers

Anonymous

2023-07-06T15:28:51+00:00

Hello Ryan,

Thanks for the reply. I have a Microsoft dock and I tried the physical wired connection with no lock. First test I disconnected from wifi and in second test I disabled wifi. In both scenarios, everything worked except the L2TP VPN ☹️
Was this answer helpful?

0 comments No comments
Anonymous

2023-07-06T15:00:42+00:00
Tried the following on Windows 11 Pro:

Enabled - Routing and remote access service

Manually started Routing and Remote Access service

Tried L2TP VPN client - VPN connects, but the extremely slow performance (practically unusable) remained. Keep in mind that connecting to the same VPN server through Apple MAC (L2TP VPN) client or any apple iOS VPN (L2TP) client works and the speed is as it used to be before the Microsft Patch broke it.

Set the Routing and Remote Access service Start to "Automatic" and rebooted the computer.

After reboot tried the VPN client. It connects but the same issue remains with the VPN client.

Set the Service start to "Delayed Start" and then rebooted the computer.

After reboot tried the VPN client. It connects but the same issue remains with the VPN client.

So in essence, this workaround did not solve my issues.

I have actually tried re-installing the Windows 11 from scratch and still have the same problems.

I am very perplexed, to say the least.
Do you have a USB to Ethernet dongle? I had no issues when using a wired connection instead of wireless. However, it wasn't convenient to use everywhere.
Was this answer helpful?

0 comments No comments
Anonymous

2023-07-06T14:47:31+00:00
Tried the following on Windows 11 Pro:
- Enabled - Routing and remote access service
- Manually started Routing and Remote Access service
- Tried L2TP VPN client - VPN connects, but the extremely slow performance (practically unusable) remained. Keep in mind that connecting to the same VPN server through Apple MAC (L2TP VPN) client or any apple iOS VPN (L2TP) client works and the speed is as it used to be before the Microsft Patch broke it.
- Set the Routing and Remote Access service Start to "Automatic" and rebooted the computer.
- After reboot tried the VPN client. It connects but the same issue remains with the VPN client.
- Set the Service start to "Delayed Start" and then rebooted the computer.
- After reboot tried the VPN client. It connects but the same issue remains with the VPN client.
So in essence, this workaround did not solve my issues.

I have actually tried re-installing the Windows 11 from scratch and still have the same problems.

I am very perplexed, to say the least.
Was this answer helpful?

0 comments No comments
Anonymous

2023-07-05T22:41:32+00:00

You sir are a genius. Enabling Routing and Remote Access worked like a champ. VPNs are screaming again. Many thanks, our team has been breaking thier heads on this one
Was this answer helpful?

0 comments No comments