How severe is CVE-2026-20999?

CVE-2026-20999 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-20999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20999?

CVE-2026-20999 affects Samsung Smart Switch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20999?

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-2026-20999 have an EU (EUVD) identifier?

Yes. CVE-2026-20999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12315.

When was CVE-2026-20999 published?

CVE-2026-20999 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-20999

CVE-2026-20999 is a high-severity vulnerability in Samsung Smart Switch with a CVSS 3.x base score of 7.5. 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-294.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12315
Weakness: CWE-294
Affected product: Samsung Smart Switch
Published: 2026-03-16
Last modified: 2026-06-17

Description

Authentication bypass by replay in Smart Switch prior to version 3.7.69.15 allows remote attackers to trigger privileged functions.

Frequently asked questions

What is CVE-2026-20999?: Authentication bypass by replay in Smart Switch prior to version 3.7.69.15 allows remote attackers to trigger privileged functions.
How severe is CVE-2026-20999?: CVE-2026-20999 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-20999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20999?: CVE-2026-20999 affects Samsung Smart Switch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20999?: 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-2026-20999 have an EU (EUVD) identifier?: Yes. CVE-2026-20999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12315.
When was CVE-2026-20999 published?: CVE-2026-20999 was published on 2026-03-16 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=03

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.
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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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