How severe is CVE-2026-21075?

CVE-2026-21075 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2026-21075 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21075?

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

When was CVE-2026-21075 published?

CVE-2026-21075 was published on 2026-08-10 and last updated on 2026-08-18.

CVE-2026-21075

CVE-2026-21075 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.3. 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-939.

Key facts

Severity: Medium (CVSS 4.0 base score 5.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-939
Published: 2026-08-10
Last modified: 2026-08-18

Description

Improper authorization in handler for custom URL scheme in My Galaxy prior to version 6.3 allows remote attackers to access sensitive information.

Frequently asked questions

What is CVE-2026-21075?: Improper authorization in handler for custom URL scheme in My Galaxy prior to version 6.3 allows remote attackers to access sensitive information.
How severe is CVE-2026-21075?: CVE-2026-21075 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2026-21075 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-21075?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-21075 published?: CVE-2026-21075 was published on 2026-08-10 and last updated on 2026-08-18.

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=08

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