What is CVE-2025-21035?

CVE-2025-21035 is a medium-severity vulnerability in Google Android, classified under CWE-284: IMPROPER ACCESS CONTROL. CVSS score: 4.6/10. Published 2025-09-03.

How severe is CVE-2025-21035?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Vulnerability in Google Android

CVE-2025-21035

Improper access control in Samsung Calendar prior to version 12.5.06.5 in Android 14 and 12.6.01.12 in Android 15 allows physical attackers to access data across multiple user profiles.

Published 2025-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Android — versions 14.0, 15.0
Samsung Calendar
Samsung Mobile Calendar — versions 12.5.06.5 in Android 14 and 12.6.01.12 in Android 15

References

security.samsungmobile.com/serviceWeb.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2025-21035?: CVE-2025-21035 is a medium-severity vulnerability in Google Android, classified under CWE-284: IMPROPER ACCESS CONTROL. CVSS score: 4.6/10. Published 2025-09-03.
How severe is CVE-2025-21035?: Medium severity. CVSS v3 base score is 4.6 out of 10.