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Unrated severityNVD Advisory· Published Dec 31, 1999· Updated Jun 16, 2026

CVE-1999-1087

CVE-1999-1087

Description

Internet Explorer 4 treats a 32-bit number ("dotless IP address") in the a URL as the hostname instead of an IP address, which causes IE to apply Local Intranet Zone settings to the resulting web page, allowing remote malicious web servers to conduct unauthorized activities by using URLs that contain the dotless IP address for their server.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • Microsoft/Internet Explorer4 versions
    cpe:2.3:a:microsoft:internet_explorer:4.0.1:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:a:microsoft:internet_explorer:4.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:internet_explorer:4.0.1:sp1:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:internet_explorer:4.0:*:*:*:*:*:*:*
    • (no CPE)range: =4

Patches

Vulnerability mechanics

References

5

News mentions

0

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