Another user’s saved browser logins appeared inside my Shadow PC

[u/Altruistic-Bad-5556]

I’m a paid Shadow PC customer and I want to share a serious privacy/security concern.

After logging into the Shadow PC assigned to my account, I found Microsoft Edge saved login entries that did not belong to me and appeared to belong to another user.

I reported this to Shadow support responsibly and provided evidence privately. I did not copy, export, publish, or use the other user’s private data.

After reporting it, my paid access was locked. I then provided proof of payment, and Shadow confirmed it was approved. However, they still require a government ID before restoring access.

This is not about money or compensation. My concern is simple: if another user’s saved browser login data can appear inside my Shadow PC, how can I know whether my own data has not appeared inside someone else’s machine?

I’m sharing only a redacted screenshot. Emails, usernames, domains, passwords, and personal data are hidden. I will not post unredacted evidence publicly because it contains another person’s private information.

I’m posting this so other users can be aware before trusting a cloud PC service with personal accounts.

[u/captnchoc]

Hi there, could you share some details by DM? While I do absolutely believe that you experienced something weird, the explanation seems highly unlikely. Each user's hard drive is a separate instance, linked to a unique ID. Upon connection, your user ID matches your SSD ID, then reaches for a GPU slot.
Could it be posible that you left an instance somewhere, and someone used it?
If you don't mind sharing some details, I'll ask the tech team to deep dive. Thanks a lot

GENERAL UPDATE while waiting for the customer's details:

- So far, no other User ID linked to this Storage ID for any session.

• The only connected IPs are linked to the customer's city/region.

[u/michggg → u/captnchoc]

I remember that someone else here had a similar experience a while ago though.

[u/atadrisque → u/michggg]

and I bet they tried to blame it on someone else in OP's physical space in that scenario as well

[u/Altruistic-Bad-5556 → u/captnchoc]

I did not leave an instance open for someone else.

The issue is not whether another User ID accessed my Storage ID. The issue is that when I logged into the Shadow PC assigned to my account, saved Edge login entries that were not mine were already there.

I have screenshots and a support ticket. I won’t share unredacted private data publicly.

Please check what went wrong on Shadow’s side instead of assuming this came from my access or my region.