{"cve":"CVE-2001-0004","nvd":{"published":"2001-02-12T05:00:00.000","modified":"2026-06-16T21:53:28.340","status":"Modified","description":"IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending \"%3F+.htr\" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the \"File Fragment Reading via .HTR\" vulnerability.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://marc.info/?l=bugtraq&m=97897954625305&w=2","http://www.securityfocus.com/bid/2313","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004","https://exchange.xforce.ibmcloud.com/vulnerabilities/5903","http://marc.info/?l=bugtraq&m=97897954625305&w=2"],"products":["microsoft:internet_information_server","microsoft:internet_information_services"],"source":"nvd","synced_at":"2026-10-19T19:33:02.361923049+00:00"},"epss":{"cve":"CVE-2001-0004","score":0.28215,"percentile":0.98113,"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."]}