High severity · published Oct 21, 2026
CVE-2026-102486
Out-of-bounds Read in ntpsec
New
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator and Encrypted Extension Fields (AEEF) field with an oversized nonce length.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NT
ntpsec · NTPsec
1.1.4 before 1.2.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102486
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102486
gitlab.com
https://gitlab.com/NTPsec/ntpsec/-/commit/7cc079387
gitlab.com
https://gitlab.com/NTPsec/ntpsec/-/work_items/891
gitlab.com
https://gitlab.com/NTPsec/ntpsec/-/work_items/895
More from ntpsec
9.1
CVE-2019-6443
An issue was discovered in NTPsec before 1.1.3
9.1
CVE-2019-6444
An issue was discovered in NTPsec before 1.1.3
7.5
CVE-2026-102483
Reachable Assertion in ntpsec
7.5
CVE-2023-4012
ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3)
7.4
CVE-2021-22212
ntpkeygen can generate keys that ntpd fails to parse