{"schema_version":1,"title":"NTPsec vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in NTPsec: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-121506, was published on 3 November 2026. 1 vulnerability in the last four weeks, up from none in the four before.","url":"https://junglewise.ai/threats/technologies/ntpsec","json_url":"https://junglewise.ai/threats/technologies/ntpsec.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/ntpsec","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","thin":true,"counts":{"high":1,"all_time":3,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":1,"last_90_days":1,"last_365_days":2},"latest":[{"cve":"CVE-2026-121506","cvss":7.4,"slug":"cve-2026-121506-an-out-of-bounds-read-and-write-in-nts-client-extension-field","title":"NTPsec out-of-bounds read/write in NTS client extension parsing","severity":"high","exploited":false,"published_at":"2026-11-03T15:17:37.717+00:00","url":"https://junglewise.ai/threats/cve-2026-121506-an-out-of-bounds-read-and-write-in-nts-client-extension-field"},{"cve":"CVE-2026-18321","cvss":4.7,"slug":"cve-2026-18321-ntpsec-buffer-overflow-in-zyfer-refclock","title":"NTPsec buffer overflow in Zyfer refclock","severity":"medium","exploited":false,"published_at":"2026-07-31T19:17:08.183+00:00","url":"https://junglewise.ai/threats/cve-2026-18321-ntpsec-buffer-overflow-in-zyfer-refclock"},{"cve":"CVE-2016-1551","cvss":3.7,"slug":"cve-2016-1551-ntp-and-ntpsec-reference-clock-impersonation-vulnerability","title":"NTP and NTPsec reference clock impersonation vulnerability","severity":"low","exploited":false,"published_at":"2017-01-27T17:59:00.227+00:00","url":"https://junglewise.ai/threats/cve-2016-1551-ntp-and-ntpsec-reference-clock-impersonation-vulnerability"}],"weekly":[{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-05","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-12","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-19","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-26","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-11-02","critical":0,"exploited":0,"vulnerabilities":1},{"week":"2026-11-09","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Ntpsec Ntpd","slug":"ntpsec-ntpd","vulnerabilities":4,"url":"https://junglewise.ai/threats/technologies/ntpsec-ntpd"}],"technology":{"hub":true,"name":"NTPsec","slug":"ntpsec","vendor":{"hub":true,"name":"Ntpsec","slug":"ntpsec","url":"https://junglewise.ai/threats/vendors/ntpsec"},"aliases":[],"category":"service","homepage":"https://www.ntpsec.org/","repo_url":"https://gitlab.com/ntpsec/ntpsec","description":"Secure, hardened implementation of the Network Time Protocol for time synchronization.","url":"https://junglewise.ai/threats/technologies/ntpsec"},"most_severe":[{"cve":"CVE-2026-121506","cvss":7.4,"slug":"cve-2026-121506-an-out-of-bounds-read-and-write-in-nts-client-extension-field","title":"NTPsec out-of-bounds read/write in NTS client extension parsing","severity":"high","exploited":false,"published_at":"2026-11-03T15:17:37.717+00:00","url":"https://junglewise.ai/threats/cve-2026-121506-an-out-of-bounds-read-and-write-in-nts-client-extension-field"},{"cve":"CVE-2026-18321","cvss":4.7,"slug":"cve-2026-18321-ntpsec-buffer-overflow-in-zyfer-refclock","title":"NTPsec buffer overflow in Zyfer refclock","severity":"medium","exploited":false,"published_at":"2026-07-31T19:17:08.183+00:00","url":"https://junglewise.ai/threats/cve-2026-18321-ntpsec-buffer-overflow-in-zyfer-refclock"},{"cve":"CVE-2016-1551","cvss":3.7,"slug":"cve-2016-1551-ntp-and-ntpsec-reference-clock-impersonation-vulnerability","title":"NTP and NTPsec reference clock impersonation vulnerability","severity":"low","exploited":false,"published_at":"2017-01-27T17:59:00.227+00:00","url":"https://junglewise.ai/threats/cve-2016-1551-ntp-and-ntpsec-reference-clock-impersonation-vulnerability"}],"generated_at":"2026-11-11T03:07:00.183524+00:00"}