CVE-1999-1087
HighExploitation Probability (EPSS)
Very high risk93th percentile - higher than 93% of all known CVEs
Summary
Internet Explorer 4 treats a 32-bit number ("dotless IP address") in a URL as the hostname instead of an IP address, causing Local Intranet Zone settings to be applied to the resulting web page.
Risk Assessment
This allows remote malicious web servers to conduct unauthorized activities by using URLs that contain the dotless IP address for their server.
Recommendation
It is recommended to update Internet Explorer to a newer version or implement appropriate security measures to mitigate the risk associated with this vulnerability.
Original NVD description (English source)
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.