Is KB5026372 causing an issue with VPN connections?

Anonymous
2023-05-19T12:42:04+00:00

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.

Windows for home | Windows 11 | Windows update

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Anonymous
2023-05-19T13:20:43+00:00

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

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  1. Anonymous
    2023-07-13T21:48:20+00:00

    OK,,, I tried your solution again. and this time it appears to be working.... This is REALLY weird. but, it does appear to have fixed the issue on my computer. now I have to try it on other computers and see if it fixes it on them.

    1.) Set "Routing and Remote Access" Startup type to "Automatic Delayed Start" And Click "APPLY"

    2.) START the Service

    3.) Reboot

    4.) Logon and Wait 1 minute before clicking on anything.

    5.) Check to see if the "Routing and Remote Access" Service has indeed started on its own.

    * If so, Connect to VPN, wait 30 seconds, confirm full functionality

    ** If not, Repeat Steps 1-4 (Precisely) and try again

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  2. Anonymous
    2023-07-13T21:42:26+00:00

    This is a different issue though. everyone I know can "CONNECT" to the VPN. it's just that the speed is less than 1mb upload and 1mb download. it connects it's just uselessly slow.

    when this issue first came out, Bleeping computer and many others reached out to microsoft and they acknowledged there was an issue and said they would fix it in "a few weeks".

    it's now been over two months. I've reached out to multiple companies that are also experiencing this same issue.

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  3. Anonymous
    2023-07-13T20:42:49+00:00

    Can confirm that this patch does not fix the issue. We observe that only a handful of users is affected and only autoconnect is not working correctly. Manually connecting works on our W11 clients.

    I just saw the release-notes for the Preview-Channel (Only W10 though..)

    "This update addresses an issue that might affect some VPN clients. They might not establish a connection."
    Releasing Windows 10 Build 19045.3269 to Release Preview Channel | Windows Insider Blog

    Guess we will have to wait until next month :)

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  4. Anonymous
    2023-07-13T11:22:35+00:00

    I just installed July's CU (KB5028185) and tested and the VPN issue is still present.

    Can also confirm enabling Routing and Remote Access worked for me and another user while testing.

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