{"cve":"CVE-2009-4491","nvd":{"published":"2010-01-13T20:30:00.500","modified":"2026-06-16T23:13:46.053","status":"Modified","description":"thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-20","CWE-94"],"references":["http://packetstormsecurity.com/files/175949/m-privacy-TightGate-Pro-Code-Execution-Insecure-Permissions.html","http://seclists.org/fulldisclosure/2023/Nov/13","http://www.securityfocus.com/archive/1/508830/100/0/threaded","http://www.ush.it/team/ush/hack_httpd_escape/adv.txt","http://packetstormsecurity.com/files/175949/m-privacy-TightGate-Pro-Code-Execution-Insecure-Permissions.html"],"products":["acme:thttpd"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4491","score":0.13718,"percentile":0.96503,"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."]}