Yubico YubiKey 5 Series devices with firmware before 5.7.0 and YubiHSM 2 devices with…
Priority LOW 20CWE-203Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-203.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 36
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:yubico:yubikey_5c_nfc_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c_nfc:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5_nfc_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5_nfc:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5c_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5_nano_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5_nano:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5c_nano_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c_nano:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
- cpe:2.3:o:yubico:yubikey_5c_nfc_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c_nfc:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5_nfc_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5_nfc:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5c_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5_nano_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5_nano:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5c_nano_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c_nano:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
Show 26 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:yubico:yubikey_5ci_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5ci:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5_nfc_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5_nfc_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5c_nfc_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c_nfc_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5c_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5_nano_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5_nano_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5c_nano_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5c_nano_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_5ci_fips_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_5ci_fips:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_c_bio_firmware:*:*:*:*:fido:*:*:* | before 5.7.2 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_c_bio:-:*:*:*:fido:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubikey_bio_firmware:*:*:*:*:fido:*:*:* | before 5.7.2 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubikey_bio:-:*:*:*:fido:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:security_key_nfc_by_yubico_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:security_key_nfc_by_yubico:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:security_key_c_nfc_by_yubico_firmware:*:*:*:*:*:*:*:* | before 5.7 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:security_key_c_nfc_by_yubico:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Yubico |
| cpe:2.3:o:yubico:yubihsm_2_fips_firmware:*:*:*:*:*:*:*:* | before 2.4.0 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubihsm_2_fips:2.2:*:*:*:*:*:*:* | 2.2 | Running on | Yubico |
| cpe:2.3:o:yubico:yubihsm_2_firmware:*:*:*:*:*:*:*:* | before 2.4.0 | Vulnerable | Yubico |
| cpe:2.3:h:yubico:yubihsm_2:2.3.2:*:*:*:*:*:*:* | 2.3.2 | Running on | Yubico |
- cpe:2.3:o:yubico:yubikey_5ci_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5ci:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5_nfc_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5_nfc_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5c_nfc_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c_nfc_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5c_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5_nano_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5_nano_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5c_nano_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5c_nano_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_5ci_fips_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_5ci_fips:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_c_bio_firmware:*:*:*:*:fido:*:*:* Versions before 5.7.2 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_c_bio:-:*:*:*:fido:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubikey_bio_firmware:*:*:*:*:fido:*:*:* Versions before 5.7.2 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubikey_bio:-:*:*:*:fido:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:security_key_nfc_by_yubico_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:security_key_nfc_by_yubico:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:security_key_c_nfc_by_yubico_firmware:*:*:*:*:*:*:*:* Versions before 5.7 Vulnerable ·Yubico
- cpe:2.3:h:yubico:security_key_c_nfc_by_yubico:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yubico
- cpe:2.3:o:yubico:yubihsm_2_fips_firmware:*:*:*:*:*:*:*:* Versions before 2.4.0 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubihsm_2_fips:2.2:*:*:*:*:*:*:* Versions 2.2 Running on ·Yubico
- cpe:2.3:o:yubico:yubihsm_2_firmware:*:*:*:*:*:*:*:* Versions before 2.4.0 Vulnerable ·Yubico
- cpe:2.3:h:yubico:yubihsm_2:2.3.2:*:*:*:*:*:*:* Versions 2.3.2 Running on ·Yubico
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-45678
- 2026-10-03 Alias added: GHSA-cf4q-v7mm-g53q
References
Advisory 3
Sources
- CVE-2024-45678 · CVE Program
- CVE-2024-45678 · NVD
- FIRST EPSS
- GHSA-cf4q-v7mm-g53q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences