{"cve":"CVE-2021-36754","nvd":{"published":"2021-07-30T14:15:18.253","modified":"2026-06-17T03:59:06.827","status":"Modified","description":"PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.","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-119"],"references":["http://www.openwall.com/lists/oss-security/2021/07/26/2","https://doc.powerdns.com/authoritative/security-advisories/index.html","https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2021-01.html","http://www.openwall.com/lists/oss-security/2021/07/26/2","https://doc.powerdns.com/authoritative/security-advisories/index.html"],"products":["powerdns:authoritative_server"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-36754","score":0.64857,"percentile":0.99246,"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."]}