How severe is CVE-2023-21426?

CVE-2023-21426 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-21426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21426?

CVE-2023-21426 primarily affects Samsung Android. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21426?

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

When was CVE-2023-21426 published?

CVE-2023-21426 was published on 2023-02-09 and last updated on 2026-06-17.

CVE-2023-21426

CVE-2023-21426 is a medium-severity vulnerability in Samsung Android with a CVSS 3.x base score of 4.3. 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-798.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Samsung Android
Published: 2023-02-09
Last modified: 2026-06-17

Description

Hardcoded AES key to encrypt cardemulation PINs in NFC prior to SMR Jan-2023 Release 1 allows attackers to access cardemulation PIN.

Frequently asked questions

What is CVE-2023-21426?: Hardcoded AES key to encrypt cardemulation PINs in NFC prior to SMR Jan-2023 Release 1 allows attackers to access cardemulation PIN.
How severe is CVE-2023-21426?: CVE-2023-21426 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-21426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21426?: CVE-2023-21426 primarily affects Samsung Android. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21426 published?: CVE-2023-21426 was published on 2023-02-09 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=01

Affected products (50)

cpe:2.3:o:samsung:android:10.0:-:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-apr-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-apr-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-apr-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-apr-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-aug-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-aug-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-aug-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-aug-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-dec-2019-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-dec-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-dec-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-dec-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-dec-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-feb-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-feb-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-feb-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jan-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jan-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jan-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jul-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jul-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jul-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jul-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jun-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jun-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jun-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-jun-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-mar-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-mar-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-mar-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-mar-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-may-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-may-2021-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-may-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-may-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-nov-2019-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-nov-2020-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:10.0:smr-nov-2021-r1:*:*:*:*:*:*

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