CVE-2024-45678

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.

Published: 2024-09-03 Last update: 2025-03-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-45678 is rated Low Risk (25.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.33%). 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-2024-45678

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 2026-06-15 0.24% 0.33% +0.08%
2 2026-04-28 0.25% 0.24% -0.01%
3 2026-04-21 — 0.25% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-45678

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.2 3.1 MEDIUM
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.5 3.6 [email protected]
4.2 3.1 MEDIUM
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 0.5 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-45678

Affected software / configurations for CVE-2024-45678

Vendor Product Version Raw CPE
yubico yubikey_5c_nfc_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_nfc_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5_nfc_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5_nfc_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5c_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5_nano_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5_nano_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5c_nano_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_nano_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5ci_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5ci_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5_nfc_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5_nfc_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5c_nfc_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_nfc_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5c_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5_nano_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5_nano_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5c_nano_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5c_nano_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_5ci_fips_firmware < 5.7 cpe:2.3:o:yubico:yubikey_5ci_fips_firmware:*:*:*:*:*:*:*:*
yubico yubikey_c_bio_firmware < 5.7.2 cpe:2.3:o:yubico:yubikey_c_bio_firmware:*:*:*:*:fido:*:*:*
yubico yubikey_bio_firmware < 5.7.2 cpe:2.3:o:yubico:yubikey_bio_firmware:*:*:*:*:fido:*:*:*
yubico security_key_nfc_by_yubico_firmware < 5.7 cpe:2.3:o:yubico:security_key_nfc_by_yubico_firmware:*:*:*:*:*:*:*:*
yubico security_key_c_nfc_by_yubico_firmware < 5.7 cpe:2.3:o:yubico:security_key_c_nfc_by_yubico_firmware:*:*:*:*:*:*:*:*
yubico yubihsm_2_fips_firmware < 2.4.0 cpe:2.3:o:yubico:yubihsm_2_fips_firmware:*:*:*:*:*:*:*:*
yubico yubihsm_2_firmware < 2.4.0 cpe:2.3:o:yubico:yubihsm_2_firmware:*:*:*:*:*:*:*:*

References for CVE-2024-45678

cvelogic Threat Intelligence