{"cve":"CVE-1999-1087","nvd":{"published":"1999-12-31T05:00:00.000","modified":"2026-06-16T21:49:41.647","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://support.microsoft.com/support/kb/articles/q168/6/17.asp","http://www.microsoft.com/Windows/Ie/security/dotless.asp","http://www.osvdb.org/7828","https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-016","https://exchange.xforce.ibmcloud.com/vulnerabilities/2209"],"products":["microsoft:internet_explorer"],"source":"nvd","synced_at":"2026-10-19T19:33:01.030757803+00:00"},"epss":{"cve":"CVE-1999-1087","score":0.06401,"percentile":0.93675,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}