What is CVE-2021-25476?

CVE-2021-25476 is a medium-severity vulnerability in Google Android, classified under CWE-1295. CVSS score: 4.1/10. Published 2021-10-06.

How severe is CVE-2021-25476?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Vulnerability in Google Android

CVE-2021-25476

An information disclosure vulnerability in Widevine TA log prior to SMR Oct-2021 Release 1 allows attackers to bypass the ASLR protection mechanism in TEE.

Published 2021-10-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.8% 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

Google Android — versions 10.0, 11.0
Samsung Exynos
Samsung Mobile Devices — versions Select Q(10.0), R(11.0) devices with Exynos chipsets

Weakness classification (CWE)

CWE-1295

References

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

Frequently asked questions

What is CVE-2021-25476?: CVE-2021-25476 is a medium-severity vulnerability in Google Android, classified under CWE-1295. CVSS score: 4.1/10. Published 2021-10-06.
How severe is CVE-2021-25476?: Medium severity. CVSS v3 base score is 4.1 out of 10.