What is CVE-2025-21006?

CVE-2025-21006 is a high-severity vulnerability in Samsung Android, classified under Out-of-bounds Write. CVSS score: 7.0/10. Published 2025-07-08.

How severe is CVE-2025-21006?

High severity. CVSS v3 base score is 7.0 out of 10.

Buffer overflow in Samsung Android

CVE-2025-21006

Out-of-bounds write in handling of macro blocks for MPEG4 codec in libsavsvc.so prior to Android 15 allows local attackers to write out-of-bounds memory.

Vulnerability class: Buffer Overflow

Published 2025-07-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

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

Affected products

Samsung Android
Samsung Mobile Libsavsvc.so — versions Android 15

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2025-21006?: CVE-2025-21006 is a high-severity vulnerability in Samsung Android, classified under Out-of-bounds Write. CVSS score: 7.0/10. Published 2025-07-08.
How severe is CVE-2025-21006?: High severity. CVSS v3 base score is 7.0 out of 10.