| Package | Affected versions | Patched versions |
|---|---|---|
| outlook | = 2000= 97= 98 | |
| outlook express | = 4.0= 4.27.3110= 4.5= 4.72.2106= 4.72.3120.0= 4.72.3612= 5.0= 5.5 |
Microsoft Outlook 8.5 and earlier, and Outlook Express 5 and earlier, with the "Automatically put people I reply to in my address book" option enabled, do not notify the user when the "Reply-To" address is different than the "From" address, which could allow an untrusted remote attacker to spoof legitimate addresses and intercept email from the client that is intended for another user.
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