How severe is CVE-2025-21018?

CVE-2025-21018 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-21018 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21018?

CVE-2025-21018 affects Samsung Blockchain Keystore. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-21018?

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

Does CVE-2025-21018 have an EU (EUVD) identifier?

Yes. CVE-2025-21018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23772.

When was CVE-2025-21018 published?

CVE-2025-21018 was published on 2025-08-06 and last updated on 2026-06-17.

CVE-2025-21018

CVE-2025-21018 is a medium-severity vulnerability in Samsung Blockchain Keystore with a CVSS 3.x base score of 4.4. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23772
Weakness: CWE-125
Affected product: Samsung Blockchain Keystore
Published: 2025-08-06
Last modified: 2026-06-17

Description

Out-of-bounds read in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to read out-of-bounds memory.

Frequently asked questions

What is CVE-2025-21018?: Out-of-bounds read in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to read out-of-bounds memory.
How severe is CVE-2025-21018?: CVE-2025-21018 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-21018 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21018?: CVE-2025-21018 affects Samsung Blockchain Keystore. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-21018?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-21018 have an EU (EUVD) identifier?: Yes. CVE-2025-21018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23772.
When was CVE-2025-21018 published?: CVE-2025-21018 was published on 2025-08-06 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=08

Affected products (1)

cpe:2.3:a:samsung:blockchain_keystore:*:*:*:*:*:*:*:*

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