How severe is CVE-2025-23421?

CVE-2025-23421 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2025-23421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-23421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-23421 have an EU (EUVD) identifier?

Yes. CVE-2025-23421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3169.

When was CVE-2025-23421 published?

CVE-2025-23421 was published on 2025-02-13 and last updated on 2026-06-17.

CVE-2025-23421

CVE-2025-23421 is a medium-severity vulnerability with a CVSS 3.x base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-552.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
CVSS v4: 6.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-3169
Weakness: CWE-552
Published: 2025-02-13
Last modified: 2026-06-17

Description

An attacker could obtain firmware files and reverse engineer their intended use leading to loss of confidentiality and integrity of the hardware devices enabled by the Qardio iOS and Android applications.

Frequently asked questions

What is CVE-2025-23421?: An attacker could obtain firmware files and reverse engineer their intended use leading to loss of confidentiality and integrity of the hardware devices enabled by the Qardio iOS and Android applications.
How severe is CVE-2025-23421?: CVE-2025-23421 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2025-23421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-23421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-23421 have an EU (EUVD) identifier?: Yes. CVE-2025-23421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3169.
When was CVE-2025-23421 published?: CVE-2025-23421 was published on 2025-02-13 and last updated on 2026-06-17.

References

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