{"cve":"CVE-2001-1556","nvd":{"published":"2001-12-31T05:00:00.000","modified":"2026-06-16T21:56:30.050","status":"Modified","description":"The log files in Apache web server contain information directly supplied by clients and does not filter or quote control characters, which could allow remote attackers to hide HTTP requests and spoof source IP addresses when logs are viewed with UNIX programs such as cat, tail, and grep.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-532"],"references":["http://archives.neohapsis.com/archives/bugtraq/2001-10/0231.html","http://httpd.apache.org/docs/logs.html","http://www.iss.net/security_center/static/7363.php","http://archives.neohapsis.com/archives/bugtraq/2001-10/0231.html","http://httpd.apache.org/docs/logs.html"],"products":["apache:http_server"],"source":"nvd","synced_at":"2026-10-19T19:34:38.930894741+00:00"},"epss":{"cve":"CVE-2001-1556","score":0.03564,"percentile":0.89347,"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."]}