How severe is CVE-2025-21064?

CVE-2025-21064 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21064 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21064?

CVE-2025-21064 affects Samsung Smart Switch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-21064?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-21064 have an EU (EUVD) identifier?

Yes. CVE-2025-21064 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33669.

When was CVE-2025-21064 published?

CVE-2025-21064 was published on 2025-10-10 and last updated on 2026-06-17.

CVE-2025-21064

CVE-2025-21064 is a high-severity vulnerability in Samsung Smart Switch with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-33669
Affected product: Samsung Smart Switch
Published: 2025-10-10
Last modified: 2026-06-17

Description

Improper authentication in Smart Switch prior to version 3.7.66.6 allows adjacent attackers to access transferring data.

Frequently asked questions

What is CVE-2025-21064?: Improper authentication in Smart Switch prior to version 3.7.66.6 allows adjacent attackers to access transferring data.
How severe is CVE-2025-21064?: CVE-2025-21064 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21064 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21064?: CVE-2025-21064 affects Samsung Smart Switch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-21064?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-21064 have an EU (EUVD) identifier?: Yes. CVE-2025-21064 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33669.
When was CVE-2025-21064 published?: CVE-2025-21064 was published on 2025-10-10 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10

Affected products (1)

cpe:2.3:a:samsung:smart_switch:*:*:*:*:*:*:*:*

More vulnerabilities in Samsung Smart Switch

CVE-2026-20998 — Critical (CVSS 9.8): Improper authentication in Smart Switch prior to version 3.7.69.15 allows remote attackers to bypass authentication.
CVE-2026-20997 — Critical (CVSS 9.8): Improper verification of cryptographic signature in Smart Switch prior to version 3.7.69.15 allows remote attackers to…
CVE-2025-21078 — High (CVSS 8.8): Use of insufficiently random value of secretKey in Smart Switch prior to version 3.7.68.6 allows adjacent attackers to…
CVE-2025-21062 — High (CVSS 7.8): Use of a broken or risky cryptographic algorithm in Smart Switch prior to version 3.7.67.2 allows local attackers to…
CVE-2026-20999 — High (CVSS 7.5): Authentication bypass by replay in Smart Switch prior to version 3.7.69.15 allows remote attackers to trigger…
CVE-2025-21061 — High (CVSS 7.1): Cleartext storage of sensitive information in Smart Switch prior to version 3.7.67.2 allows local attackers to access…

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