Cyber Resilience

CVE-2023-26555

Medium

Published: 11 April 2023

Published
11 April 2023
Modified
11 February 2025
KEV Added
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Patch
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CVSS Score v3.1 6.4 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0094 76.7th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-26555 is a medium-severity Out-of-bounds Write (CWE-787) vulnerability in Ntp Ntp. Its CVSS base score is 6.4 (Medium).

Operationally, ranked in the top 23.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be complex, e.g., with a manipulated GPS receiver.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

ntp
ntp
4.2.8

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References