Is CVE-2024-45678 actively exploited?

No active exploitation of CVE-2024-45678 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-45678 be exploited remotely?

No. CVE-2024-45678 requires physical access to exploit.

What is the CVSS score of CVE-2024-45678?

CVE-2024-45678 has a CVSS score of 4.2 (MEDIUM).

HOME VULNERABILITIESCVE-2024-45678

MEDIUM

CVE-2024-45678

CWE-203Published: September 3, 2024· Updated: Jun 17, 2026

4.2

CVSS v3.1

Official Description

Yubico YubiKey 5 Series devices with firmware before 5.7.0 and YubiHSM 2 devices with firmware before 2.4.0 allow an ECDSA secret-key extraction attack (that requires physical access and expensive equipment) in which an electromagnetic side channel is present because of a non-constant-time modular inversion for the Extended Euclidean Algorithm, aka the EUCLEAK issue. Other uses of an Infineon cryptographic library may also be affected.

NVD Source

Technical Analysis

CVE-2024-45678 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 4.2.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorPhysical

Attack ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

yubico36 product(s)

yubikey 5c nfc firmwareyubikey 5c nfcyubikey 5 nfc firmwareyubikey 5 nfcyubikey 5c firmwareyubikey 5cyubikey 5 nano firmwareyubikey 5 nanoyubikey 5c nano firmwareyubikey 5c nanoyubikey 5ci firmwareyubikey 5ci+24

Source: NVD CPE · 36 total CPE entries