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VulnerabilityPublished

CVE-2026-102484: ntpsec · Heap-based Buffer Overflow

Affects ntpsecSource CVE Database V5

0

Not known to be exploited · CVSS 6.4 Medium : upgrade to 1.2.6 when convenient.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score
6.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.2.6
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade ntpsec to 1.2.6.

Affected software

ProductAffectedFixed in
NTPsecntpsecAffected
  • <1.2.6
Fixed in
  • 1.2.6

Description

Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.

References

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