What is CVE-2021-39787?

CVE-2021-39787 is a high-severity vulnerability in Google Android, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 7.8/10. Published 2022-03-30.

How severe is CVE-2021-39787?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Google Android

CVE-2021-39787

In SystemUI, there is a possible arbitrary Activity launch due to a confused deputy. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-12LAndroid ID: A-202506934

Published 2022-03-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Google Android — versions 12.0
Android — versions Android-12L

Weakness classification (CWE)

CWE-610 — Externally Controlled Reference to a Resource in Another Sphere

References

source.android.com/security/bulletin/android-12l (Vendor Advisory)

Frequently asked questions

What is CVE-2021-39787?: CVE-2021-39787 is a high-severity vulnerability in Google Android, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 7.8/10. Published 2022-03-30.
How severe is CVE-2021-39787?: High severity. CVSS v3 base score is 7.8 out of 10.