{"cve":"CVE-2009-1535","nvd":{"published":"2009-06-10T14:30:00.170","modified":"2026-06-16T23:07:28.580","status":"Modified","description":"The WebDAV extension in Microsoft Internet Information Services (IIS) 5.1 and 6.0 allows remote attackers to bypass URI-based protection mechanisms, and list folders or read, create, or modify files, via a %c0%af (Unicode / character) at an arbitrary position in the URI, as demonstrated by inserting %c0%af into a \"/protected/\" initial pathname component to bypass the password protection on the protected\\ folder, aka \"IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability,\" a different vulnerability than CVE-2009-1122.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-287"],"references":["http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0135.html","http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0139.html","http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0144.html","http://archives.neohapsis.com/archives/fulldisclosure/2009-05/att-0135/IIS_Advisory.pdf","http://blog.zoller.lu/2009/05/iis-6-webdac-auth-bypass-and-data.html"],"products":["microsoft:internet_information_services"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-1535","score":0.98115,"percentile":0.99912,"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."]}