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CVE Record

CVE-1999-1463: Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of serv...

Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-1999-1463 is a legacy Windows NT 4.0 issue where malformed IP fragments could be treated as a valid connection, potentially bypassing firewall assumptions or crashing the system. Exposure is limited to Windows NT 4.0 systems before SP3 that can receive IP traffic from untrusted or semi-trusted networks. Treat as a legacy exposure check, not an emergency, unless Windows NT 4.0 before SP3 still exists in reachable environments. Mitigation focus: Identify any Windows NT 4.0 systems and confirm service pack level.; Upgrade affected Windows NT 4.0 hosts to SP3 or later where feasible.; Restrict IP traffic to any legacy hosts still requiring operation..

Prepared

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

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-1999-1463 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

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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