CVE-2026-121505Low· 3.7▾ SunlitAn out-of-bounds read in the NTS-KE client response parser (nts_client_process_response_core) in NTPsec before 1.2.4 allows a malicious NTS-KE server to read the client's stack memory, including pointers that defeat ASLR, which the clien…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 20.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
An out-of-bounds read in the NTS-KE client response parser (nts_client_process_response_core) in NTPsec before 1.2.4 allows a malicious NTS-KE server to read the client's stack memory, including pointers that defeat ASLR, which the client then sends in cleartext as NTS cookies, via an NTS-KE record whose declared length exceeds the data received.
NTPsec >= 1.1.4 < 1.2.4Upgrade to version 1.2.4 or above.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-121506High· 7.4Out-of-bounds Write in NTPsec
CVE-2026-102485Medium· 5.2Out-of-bounds Read in ntpsec
CVE-2026-102486High· 7.5Out-of-bounds Read in ntpsec
CVE-2026-102483High· 7.5Reachable Assertion in ntpsec
CVE-2026-102484Medium· 6.4Heap-based Buffer Overflow in ntpsec
CVE-2021-3506High· 7.1An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4