Vendor
Ntpsec vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 7 vulnerabilities in Ntpsec: 0 in the last 7 days and 5 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. 5 vulnerabilities in the last four weeks, up from none in the four before. 2 technologies have a page of their own.
- Last 7 days
- 0
- Last 90 days
- 5
- Critical, all time
- 0
- Exploited in the wild
- 0
About Ntpsec
An open-source project maintaining a secure implementation of the Network Time Protocol.
Ntpsec technologies
Latest Ntpsec vulnerabilities
- CVE-2026-121506: NTPsec out-of-bounds read/write in NTS client extension parsinghighCVSS 7.4
- CVE-2026-102486: NTPsec ntpd out-of-bounds read in NTS extension parsinghighCVSS 7.5
- CVE-2026-102485: NTPsec ntpd out-of-bounds read in Motorola Oncore drivermediumCVSS 5.2
- CVE-2026-102484: NTPsec ntpd heap buffer overflow in JJY refclock drivermediumCVSS 6.4
- CVE-2026-102483: NTPsec ntpd denial of service in NTS Cookie handlinghighCVSS 7.5
- CVE-2026-18321: NTPsec buffer overflow in Zyfer refclockmediumCVSS 4.7
- CVE-2016-1551: NTP and NTPsec reference clock impersonation vulnerabilitylowCVSS 3.7
Most severe Ntpsec vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-102486: NTPsec ntpd out-of-bounds read in NTS extension parsinghighCVSS 7.5
- CVE-2026-102483: NTPsec ntpd denial of service in NTS Cookie handlinghighCVSS 7.5
- CVE-2026-121506: NTPsec out-of-bounds read/write in NTS client extension parsinghighCVSS 7.4
- CVE-2026-102484: NTPsec ntpd heap buffer overflow in JJY refclock drivermediumCVSS 6.4
- CVE-2026-102485: NTPsec ntpd out-of-bounds read in Motorola Oncore drivermediumCVSS 5.2
- CVE-2026-18321: NTPsec buffer overflow in Zyfer refclockmediumCVSS 4.7
- CVE-2016-1551: NTP and NTPsec reference clock impersonation vulnerabilitylowCVSS 3.7
Vulnerabilities per week
5 vulnerabilities in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 4 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 1 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Ntpsec vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/vendors/ntpsec)<a href="https://junglewise.ai/threats/vendors/ntpsec"><img src="https://junglewise.ai/threats/vendors/ntpsec/badge.svg" alt="Ntpsec vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/ntpsec.json, and this page as text at https://junglewise.ai/threats/vendors/ntpsec.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Ntpsec vulnerabilities", https://junglewise.ai/threats/vendors/ntpsec, 11 November 2026.