Microsoft Outlook Express before 4.72.3612.1700 allows a malicious user to send a message that contains a .., which can inadvertently cause Outlook to re-enter POP3 command mode and cause the POP3 session to hang.
| Software | From | Fixed in |
|---|---|---|
| microsoft / outlook_express | 4.72.3120.0 | 4.72.3120.0.x |
| microsoft / outlook_express | - | 4.72.3612.1700.x |
| microsoft / outlook_express | 4.27.3110.1 | 4.27.3110.1.x |