Is CVE-2026-102486 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102486 being exploited in the wild.

How severe is CVE-2026-102486?

High severity, with a CVSS score of 7.5, published 21 October 2026.

Which products and versions are affected?

Ntpsec Ntpd 1.1.4 through 1.2.5.

Is there a fix for CVE-2026-102486?

Yes: fixed in NTPsec ntpd 1.2.6 or later (fix committed 2026-09-15). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-102486 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-102486?

Check whether you run Ntpsec Ntpd at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-102486: NTPsec ntpd out-of-bounds read in NTS extension parsing

CVE-2026-102486 · Severity: high · CVSS 7.5 · Published 2026-10-21

NTPsec ntpd is an open-source Network Time Protocol daemon used to synchronize system clocks across networks. A vulnerability in how it processes NTS (Network Time Security) extension fields allows a remote attacker to send a specially crafted network packet that crashes the daemon, disrupting time synchronization services on affected systems.

Technologies: Ntpsec Ntpd. Vendors: Ntpsec.

Quick answers

Is CVE-2026-102486 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102486 being exploited in the wild.
How severe is CVE-2026-102486?: High severity, with a CVSS score of 7.5, published 21 October 2026.
Which products and versions are affected?: Ntpsec Ntpd 1.1.4 through 1.2.5.
Is there a fix for CVE-2026-102486?: Yes: fixed in NTPsec ntpd 1.2.6 or later (fix committed 2026-09-15). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-102486 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-102486?: Check whether you run Ntpsec Ntpd at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: NTPsec ntpd 1.2.6 or later (fix committed 2026-09-15)

Technical details

An out-of-bounds read vulnerability exists in the NTS extension field parser (nts_extens.c) where insufficient validation of the nonce length in Authenticator and Encrypted Extension Fields (AEEF) allows an attacker to read memory beyond allocated buffers. The vulnerability is triggered via a malformed NTS packet sent over the network and can cause denial of service through daemon crash. A fix validates that the nonce length matches the expected NONCE_LENGTH constant.

Affected products

NTPsec ntpd 1.1.4 through 1.2.5

Timeline

2026-10-21: disclosed

References

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