What is CVE-2026-21021?

CVE-2026-21021 is a medium-severity vulnerability in Samsung Android, classified under CWE-20: IMPROPER INPUT VALIDATION. CVSS score: 6.8/10. Published 2026-05-13.

How severe is CVE-2026-21021?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Samsung Android

CVE-2026-21021

Improper input validation in Routines prior to SMR May-2026 Release 1 allows physical attackers to launch privileged activity.

EPSS: 0.000 (14.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Samsung Android — versions 16.0
Samsung Mobile Devices — versions SMR May-2026 Release in Android 16

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21021?: CVE-2026-21021 is a medium-severity vulnerability in Samsung Android, classified under CWE-20: IMPROPER INPUT VALIDATION. CVSS score: 6.8/10. Published 2026-05-13.
How severe is CVE-2026-21021?: Medium severity. CVSS v3 base score is 6.8 out of 10.