Unwanted Email Surprise: How HTML Emails Can Clog Your Disk or Leak Windows Credentials!
Watch out for those sneaky HTML emails! They can trigger unwanted .pdf downloads faster than you can say “spam.” Even with auto-saving off, your disk might overflow with junk, or worse, your Windows credentials could take a surprise vacation via SMB links. All it takes is a peek in HTML mode!

Hot Take:
Looks like your inbox just got a little more dangerous! Who knew that even your emails could be sneakily persuading you to download unwanted files? It’s like your email has been binge-watching heist movies and decided to pull off its own little caper right on your desktop!
Key Points:
- Malicious HTML emails can auto-download .pdf files without the user’s consent.
- The exploit leverages mailbox:/// links to initiate unsolicited downloads.
- The attack can fill a user’s disk with junk data or leak credentials.
- User interaction is necessary, but visual tricks can hide the download triggers.
- Viewing emails in HTML mode opens the door for these exploits.
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