CVE-2025-14505 | Elliptic Cryptanalysis vulnerability when `k` has leading zeros

The ECDSA implementation of the Elliptic package generates incorrect signatures if an interim value of 'k' (as computed based on step 3.2 of RFC 6979 https://datatracker.ietf.org/doc/html/rfc6979 ) has leading zeros and is susceptible to cryptanalysis, which can lead to secret key exposure. This happens, because the byte-length of 'k' is incorrectly computed, resulting in its getting truncated during the computation. Legitimate transactions or communications will be broken as a result. Furthermore, due to the nature of the fault, attackers could–under certain conditions–derive the secret key, if they could get their hands on both a faulty signature generated by a vulnerable version of Elliptic and a correct signature for the same inputs. This issue affects all known versions of Elliptic (at the time of writing, versions less than or equal to 6.6.1).

Published: 2026-01-08 Last update: 2026-04-15 Assigner: 36c7be3b-2937-45df-85ea-ca7133ea542c Source: 36c7be3b-2937-45df-85ea-ca7133ea542c
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-14505 is rated Low Risk (24.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-14505

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-09 — 0.03% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-14505

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.6 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 3.4 36c7be3b-2937-45df-85ea-ca7133ea542c

Weakness enumeration for CVE-2025-14505

GitHub Security Advisory for CVE-2025-14505

GHSA-848j-6mx2-7j84 · Severity: low · Ecosystem: npm — Elliptic Uses a Cryptographic Primitive with a Risky Implementation

OS Trackers for CVE-2025-14505

vendor priority summary link
debian not yet assigned CVE-2025-14505 not yet assigned priority: Debian including 1 source packages (node-elliptic), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2025-14505
redhat medium — https://access.redhat.com/security/cve/CVE-2025-14505
ubuntu medium CVE-2025-14505 medium priority: Ubuntu including 1 source packages (node-elliptic), 7 status rows across 7 suites (bionic, focal, jammy, noble, plucky, questing, upstream): needs-triage 6, ignored 1. https://ubuntu.com/security/CVE-2025-14505

Affected software / configurations for CVE-2025-14505

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-14505

cvelogic Threat Intelligence