What is CVE-2013-6271?

CVE-2013-6271 is a vulnerability in Google Android, classified under CWE-264. Published 2013-12-14.

Is CVE-2013-6271 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Google Android

CVE-2013-6271

Android 4.0 through 4.3 allows attackers to bypass intended access restrictions and remove device locks via a crafted application that invokes the updateUnlockMethodAndFinish method in the com.android.settings.ChooseLockGeneric class with the PASSWORD_QUALITY_UNSPECIFIED option.

Published 2013-12-14 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 8.8 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.080 (94.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000

Affected products

Google Android — versions 4.0, 4.0.1, 4.0.2

Weakness classification (CWE)

CWE-264

Public proof-of-concept exploits

References

www.securitytracker.com/id/1029410 (vdb-entry)
cureblog.de/2013/11/cve-2013-6271-remove-device-locks-from-android-phone/ (Exploit)
seclists.org/fulldisclosure/2013/Nov/204 (mailing-list, Exploit)
www.theregister.co.uk/2013/12/10/android_has_lockbypass_bug/

Frequently asked questions

What is CVE-2013-6271?: CVE-2013-6271 is a vulnerability in Google Android, classified under CWE-264. Published 2013-12-14.
Is CVE-2013-6271 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.