What is CVE-2021-39689?

CVE-2021-39689 is a medium-severity vulnerability in Google Android, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.7/10. Published 2022-03-16.

How severe is CVE-2021-39689?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Vulnerability in Google Android

CVE-2021-39689

In multiple functions of odsign_main.cpp, there is a possible way to persist system attack due to a logic error in the code. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12Android ID: A-206090748

Published 2022-03-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% 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 12.0
Android — versions Android-12

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

source.android.com/security/bulletin/2022-03-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39689?: CVE-2021-39689 is a medium-severity vulnerability in Google Android, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.7/10. Published 2022-03-16.
How severe is CVE-2021-39689?: Medium severity. CVSS v3 base score is 6.7 out of 10.