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

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.001 (1.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-21070: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Weakness classification (CWE)

References

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.