CVE-1999-1033

Medium CVSS 5

Published 1999-05-11 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1033, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-1999-1033

CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P