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CVE-2026-102483— Reachable Assertion in ntpsec

Quick assessment

Affected
NTPsec ntpsec
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 NTPsec 的 ntpd 1.1.4 至 1.2.5 版本中，存在一个可被触发的退出漏洞。远程攻击者可通过发送包含过多 NTS Cookie Placeholder 扩展字段的 NTS 请求，导致守护进程终止。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1499.003 · Application Exhaustion Flood

Affected Version Matrix 1

VendorProduct Version RangeStatus
NTPsec ntpsec 1.1.4< 1.2.6 affected
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I. Basic Information for CVE-2026-102483

Vulnerability Information
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Vulnerability Title
Reachable Assertion in ntpsec
Source: CVE Program / CVE List V5
Vulnerability Description
Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the daemon via an NTS request with excess NTS Cookie Placeholder extension fields.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NTPsec ntpsec 1.1.4 ~ 1.2.6 -

II. Public POCs for CVE-2026-102483

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III. Intelligence Information for CVE-2026-102483

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Other References for CVE-2026-102483 (2)

Same Patch Batch · NTPsec · 2026-10-21 · 4 CVEs total

CVE-2026-102486 7.5 HIGH Out-of-bounds Read in ntpsec
CVE-2026-102484 6.4 MEDIUM Heap-based Buffer Overflow in ntpsec
CVE-2026-102485 5.2 MEDIUM Out-of-bounds Read in ntpsec

IV. Related Vulnerabilities

Same product: ntpsec
Same vendor: NTPsec
Same weakness: CWE-617

V. Comments for CVE-2026-102483

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