What is CVE-2021-0685?

CVE-2021-0685 is a high-severity vulnerability in Google Android, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-10-06.

How severe is CVE-2021-0685?

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

Deserialization in Google Android

CVE-2021-0685

In ParsedIntentInfo of ParsedIntentInfo.java, there is a possible parcel serialization/deserialization mismatch due to unsafe deserialization. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-191055353

Vulnerability class: Insecure Deserialization

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (8.6th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Android — versions 11.0
Android — versions Android-11

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

source.android.com/security/bulletin/2021-09-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-0685?: CVE-2021-0685 is a high-severity vulnerability in Google Android, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-10-06.
How severe is CVE-2021-0685?: High severity. CVSS v3 base score is 7.8 out of 10.