{"cve":"CVE-2011-4869","nvd":{"published":"2011-12-20T11:55:08.820","modified":"2026-06-16T23:35:32.780","status":"Modified","description":"validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html","http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html","http://osvdb.org/77910","http://secunia.com/advisories/47326","http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt"],"products":["unbound:unbound"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-4869","score":0.02985,"percentile":0.87301,"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."]}