Unity has issued an alert for a security vulnerability that affects nearly all versions of Unity, including the ones used to build VaM1 and VaM2. They have provided a patching tool to address this issue, and this is the fastest way to protect yourself from the vulnerability they mention.
You can read more about this on Unity's site:
https://unity.com/security/sept-2025-01
Note the patching tool Unity provides could be used for other Unity based applications and games you might have if those developers have not yet issued official patches.
I will be releasing an official VaM1 patch build and fixed VaM2 builds as soon as possible so users won't have to manually apply the patch. In the meantime, please use the patcher tool as outlined below.
Instructions:
You can download Unity's Patcher Tool here: https://security-patches.unity.com/bc0977e0-21a9-4f6e-9414-4f44b242110a/unity-patcher/UnityApplicationPatcher-1.0.6-Win.zip
Unzip the zip above into a folder.
Run UnityApplicationPatcher.exe in that folder
Click the Windows tab
Click the Browse button, and navigate to your VaM1 or VaM2 install folder. In that folder you should see UnityPlayer.dll. Select that file and click Open.
Now click the blue Patch button.
If successful, you should see something like the image below
After the patch is complete, you can close the patching tool and run VaM1 or VaM2 as normal. Please patch all versions of VaM1 and VaM2 you are using.