CVE-1999-1033: n/a vulnerability

CVE-1999-1033: Microsoft Outlook Express before 4.72.3612.1700 allows a malicious user to send a message that contains a ....

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 1, 2024, 16:55 UTC (UTC+00:00)

Security readout for executives and security teams

A specially crafted email could make very old Microsoft Outlook Express clients hang during POP3 mail retrieval. The provided sources describe a reliability and availability problem, not data theft or system takeover. Business concern is limited to legacy systems still using Outlook Express before 4.72.3612.1700. Exposure is likely limited to obsolete Windows-era environments still running Outlook Express before 4.72.3612.1700 with POP3 mail access enabled. Treat as a legacy hygiene item unless affected clients remain operational. Prioritize retirement or upgrade during normal risk-reduction work, not emergency response. Mitigation focus: Inventory systems using Outlook Express and confirm client versions.; Upgrade or retire Outlook Express versions before 4.72.3612.1700.; Check Microsoft or asset-owner guidance for supported remediation paths..

Prepared: Jul 1, 2026, 09:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 12, 2001, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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