{"cve":"CVE-2021-20216","nvd":{"published":"2021-03-25T19:15:13.283","modified":"2026-06-17T03:33:29.260","status":"Modified","description":"A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-401","CWE-400"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1923256","https://security.gentoo.org/glsa/202107-16","https://www.openwall.com/lists/oss-security/2021/01/31/2","https://www.privoxy.org/3.0.31/user-manual/whatsnew.html","https://bugzilla.redhat.com/show_bug.cgi?id=1923256"],"products":["privoxy:privoxy"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-20216","score":0.02276,"percentile":0.83099,"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."]}