What is CVE-2021-25517?

CVE-2021-25517 is a high-severity vulnerability in Google Android, classified under Improper Input Validation. CVSS score: 7.7/10. Published 2021-12-08.

How severe is CVE-2021-25517?

High severity. CVSS v3 base score is 7.7 out of 10.

Improper input validation in Google Android

CVE-2021-25517

An improper input validation vulnerability in LDFW prior to SMR Dec-2021 Release 1 allows attackers to perform arbitrary code execution.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-12-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.6% 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 Mobile Devices — versions Q(10.0), R(11.0) devices with selected Exynos chipsets

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2021-25517?: CVE-2021-25517 is a high-severity vulnerability in Google Android, classified under Improper Input Validation. CVSS score: 7.7/10. Published 2021-12-08.
How severe is CVE-2021-25517?: High severity. CVSS v3 base score is 7.7 out of 10.