Buffer overflow in Samsung Notes

CVE-2025-21070

Out-of-bounds write in the SPI decoder in Samsung Notes prior to version 4.4.30.63 allows local attackers to write out-of-bounds memory.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Samsung Notes
Samsung Mobile Notes — versions 4.4.30.63

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-21070?: CVE-2025-21070 is a medium-severity vulnerability in Samsung Notes, classified under Out-of-bounds Write. CVSS score: 4.0/10. Published 2025-10-10.
How severe is CVE-2025-21070?: Medium severity. CVSS v3 base score is 4.0 out of 10.