CVE-2013-4787

Exp

Android 1.6 Donut through 4.2 Jelly Bean does not properly check cryptographic signatures for applications, which allows attackers to execute arbitrary code via an application package file (APK) that is modified in a way that does not violate the cryptographic signature, probably involving multiple entries in a Zip file with the same name in which one entry is validated but the other entry is installed, aka Android security bug 8219321 and the "Master Key" vulnerability.

Published: 2013-07-09 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4787 is rated High Exploit Risk (89.8/100): CVSS Critical severity, with high exploitation likelihood (EPSS 52.60%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.38% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-4787

EDB-ID Source Kind Published Link
38627 exploit_db edb 2013-07-03 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-4787

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-20 49.22% 52.60% +3.38%
2 2025-04-24 51.78% 49.22% -2.56%
3 2025-03-30 — 51.78% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4787

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2013-4787

Affected software / configurations for CVE-2013-4787

Vendor Product Version Raw CPE
google android 1.6 cpe:2.3:o:google:android:1.6:*:*:*:*:*:*:*
google android 2.0 cpe:2.3:o:google:android:2.0:*:*:*:*:*:*:*
google android 2.0.1 cpe:2.3:o:google:android:2.0.1:*:*:*:*:*:*:*
google android 2.1 cpe:2.3:o:google:android:2.1:*:*:*:*:*:*:*
google android 2.2 cpe:2.3:o:google:android:2.2:*:*:*:*:*:*:*
google android 2.2 cpe:2.3:o:google:android:2.2:rev1:*:*:*:*:*:*
google android 2.2.1 cpe:2.3:o:google:android:2.2.1:*:*:*:*:*:*:*
google android 2.2.2 cpe:2.3:o:google:android:2.2.2:*:*:*:*:*:*:*
google android 2.2.3 cpe:2.3:o:google:android:2.2.3:*:*:*:*:*:*:*
google android 2.3 cpe:2.3:o:google:android:2.3:*:*:*:*:*:*:*
google android 2.3 cpe:2.3:o:google:android:2.3:rev1:*:*:*:*:*:*
google android 2.3.1 cpe:2.3:o:google:android:2.3.1:*:*:*:*:*:*:*
google android 2.3.2 cpe:2.3:o:google:android:2.3.2:*:*:*:*:*:*:*
google android 2.3.3 cpe:2.3:o:google:android:2.3.3:*:*:*:*:*:*:*
google android 2.3.4 cpe:2.3:o:google:android:2.3.4:*:*:*:*:*:*:*
google android 2.3.5 cpe:2.3:o:google:android:2.3.5:*:*:*:*:*:*:*
google android 2.3.6 cpe:2.3:o:google:android:2.3.6:*:*:*:*:*:*:*
google android 2.3.7 cpe:2.3:o:google:android:2.3.7:*:*:*:*:*:*:*
google android 3.0 cpe:2.3:o:google:android:3.0:*:*:*:*:*:*:*
google android 3.1 cpe:2.3:o:google:android:3.1:*:*:*:*:*:*:*
google android 3.2 cpe:2.3:o:google:android:3.2:*:*:*:*:*:*:*
google android 3.2.1 cpe:2.3:o:google:android:3.2.1:*:*:*:*:*:*:*
google android 3.2.2 cpe:2.3:o:google:android:3.2.2:*:*:*:*:*:*:*
google android 3.2.4 cpe:2.3:o:google:android:3.2.4:*:*:*:*:*:*:*
google android 3.2.6 cpe:2.3:o:google:android:3.2.6:*:*:*:*:*:*:*
google android 4.0 cpe:2.3:o:google:android:4.0:*:*:*:*:*:*:*
google android 4.0.1 cpe:2.3:o:google:android:4.0.1:*:*:*:*:*:*:*
google android 4.0.2 cpe:2.3:o:google:android:4.0.2:*:*:*:*:*:*:*
google android 4.0.3 cpe:2.3:o:google:android:4.0.3:*:*:*:*:*:*:*
google android 4.0.4 cpe:2.3:o:google:android:4.0.4:*:*:*:*:*:*:*
google android 4.1 cpe:2.3:o:google:android:4.1:*:*:*:*:*:*:*
google android 4.1.2 cpe:2.3:o:google:android:4.1.2:*:*:*:*:*:*:*
google android 4.2 cpe:2.3:o:google:android:4.2:*:*:*:*:*:*:*

References for CVE-2013-4787

cvelogic Threat Intelligence